If someone has the stl files I’m happy to print it myself.
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Thanks a lot to rukaP for the detailed explanation — that was a great summary, and I really appreciate you taking the time to explain this so clearly. 
To be honest, I hadn’t fully realized how important this point was to highlight, simply because in all of our internal testing we’ve never experienced a frame melt or similar failure. The servos we use have built-in thermal protection around 70 °C, and we’ve designed the frame to keep the servos physically isolated from the frame, allowing for more even airflow and heat dissipation, like this ⇩
The servos themselves use all-metal housings, which already have very good passive heat dissipation. In practice, adding heatsinks on top of that can actually be counterproductive by trapping heat instead of releasing it.
Under normal use, we also don’t see a strong need for active cooling. Adding fans would introduce more noise and additional failure points, which we’ve intentionally tried to avoid. That said, for very heavy or long-session users, having a fan can certainly provide extra peace of mind — and that’s something we’ll take seriously and continue to evaluate.
Really appreciate the discussion and the shared experience here. 
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Sorry, I just saw this now… thanks for clarifying.
When did you place your order? Could you please send me the order number as well?
If it’s not too late, I can create a product link for the Open Receiver so you can add it to your order.
Let me know and I’ll check it for you.
The Open Receiver for Twist is now available for individual purchase 
We offer two inner diameter options: 68 mm (original version) and 82 mm (new version).
If you’re planning to purchase the S6 Full Set and would like the 82 mm version, please leave a note in the Order Notes during checkout.
Thank you all for your continued interest and support!
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I’m going for it 
Order number is 12937. Would appreciate the free usb heating rod for sure.
Awesome thanks for letting me know!
I’ve got your order noted, and the USB heating rod will be included for you.
Hope you enjoy the setup. Looking forward to hearing how it goes! 
I ordered the full set coz I’m interested in all modules. I just noticed though in the description that it says “Drying Stick, Cleaning Brush“ as gifts with the full set. Do I still get the special sleeve with my order on top of the one included with the twist module? I was expecting it to be honest.
Thank you for checking, and sorry for any confusion 
Just to clarify, the Full Set includes everything listed on the product page, including one sleeve for the heated receiver, along with the drying stick and cleaning brush.
There isn’t an additional sleeve included beyond that, but all items shown on the page are included as described.
If you have any other questions about the contents, feel free to let me know — happy to help
My Mirabot S6 has finally arrived and I just shared my full review of the unit.
This is a completely unpaid look at the device after testing it thoroughly. After using another kit in the past I can say that this build is in a league of its own. I covered everything from the hardware performance to the mobile app features. Check out the full post here: The New Gold Standard of SR6 Builds: My Mirabot S6 Review
I have to add something to this comment up there:
Crafty Handy has reached out to me, and it appears they are taking this feedback seriously and intend to improve their design in the future. While this doesn’t change my current situation, as I am now very satisfied with the S6, I would like to reiterate the specific issues I encountered to provide context for my critique:
First, the replacement Servo board I received (following the initial servo burnout and ESP failure) had an incorrect pinout. The Front Left and Right pins were swapped on the board. This represents a major quality control oversight. Having replaced nearly every component to ensure the system’s integrity after the previous failure, finding the new board incorrectly wired was highly frustrating.
Second, and more critically: the thermal management of the Crafty Handy Silent Servo SR6 is inadequate. Under heavy loads or high-speed scripts, the servos reach temperatures that are unsafe and unacceptable for long-term operation. In my case, the servo brackets actually melted, causing the servos to come loose. The current housing design simply cannot handle these thermal demands without improved heat dissipation or active cooling.
As a result, I have decided to keep the device powered off permanently until I can engineer and install a custom cooling solution myself. I hope this serves as constructive feedback for future hardware revisions: the CH Unit requires a redesign to address these thermal and QC issues which Mirabots S6 seems to have mitigated and solved via thermal protection and an improved Frame.
Regarding the recent response from @CraftyHandy in my DMs: I appreciate the apology and the offer of $30 compensation for the hardware damage. It is encouraging to see that you are committed to improve the product. However, regarding the request to delete my original comment: I will not be deleting it. Please understand that my intention is not to harm your business, but to provide the community with a transparent and honest account of what to expect. Sharing these experiences is essential for helping other users make informed decisions and for the continued improvement of the hardware. I am glad that my feedback is contributing to these upcoming changes.
Best regards and a great 2026 to everyone. I will not be continuing this in the Mirabot Thread anymore.
I just placed my order! My order number is 13010. I forgot to put my forum ID in the ordering notes, would I be able to get the free USB heating rod?
Thanks
Thank you for your order, and no worries at all — I’ve already added a note to your order.
You’ll definitely receive the free USB heating rod with your shipment 
@rukaP , can you give any details on your CraftyHandy unit that melted? Was it with prolongued use?I was thinking of getting an OSR2+ because they are having a discount offer right now, but your comment has made me hesitant.
Thanks for any info!
I know exactly why this happened. The Crafty Handy units lack active cooling and rely on ‘custom’ (likely relabeled) “silent” servos when you are going for the Premium option, attempting to mimic Flash Hobby performance. The flaw is critical and always happened with faster scripts: the Servos catastrophically overheat after 10–20 minutes.
Using this Script, the heat melted the SR6’s PETG frame. As the frame deformed, the servo came loose and started working against the mechanical resistance, leading to a burnout.
I assumed user error at first and bought replacement parts (Servo, ESP, Power board). While their support was helpful, the failure repeated itself immediately after a full rebuild. Even with new parts, it overheated in 10–20 minutes. These ‘Silent’ servos generate too much heat for the SR6 design. I strongly advise caution when using them in any OSR or SR6 build. I was using a standard Fleshlight on the twist reciever.
Cant tell you if the standard servos fare any better, but after I went through all that, knowing that Mirabot Servos are protected from this was a huge plus leading to my purchase. Thats what sets them apart.
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Thanks for sharing this information. What protects the Mirabot servos unlike the CraftyHandy ones? I know nothing about servos. At first glance, the Crafty ones say 45Kg and the Mirabot ones say 35Kg; both cordless, I believe. So what makes the Mirabot ones better?
Also, is it that the design of the Mirabot unit itself allows for better cooling somehow??
Thanks!
Yes, Yes and Yes, I am just going to paste @Gesmax Answer from above
Thanks a lot to rukaP for the detailed explanation — that was a great summary, and I really appreciate you taking the time to explain this so clearly.
To be honest, I hadn’t fully realized how important this point was to highlight, simply because in all of our internal testing we’ve never experienced a frame melt or similar failure. The servos we use have built-in thermal protection around 70 °C, and we’ve designed the frame to keep the servos physically isolated from the frame, allowing for more even airflow and heat dissipation, like this ⇩
The servos themselves use all-metal housings, which already have very good passive heat dissipation. In practice, adding heatsinks on top of that can actually be counterproductive by trapping heat instead of releasing it.
Under normal use, we also don’t see a strong need for active cooling. Adding fans would introduce more noise and additional failure points, which we’ve intentionally tried to avoid. That said, for very heavy or long-session users, having a fan can certainly provide extra peace of mind — and that’s something we’ll take seriously and continue to evaluate.
Now, regarding the difference between 35kg and 45kg servos: to be honest, you are not going to notice any difference in actual usage.
Since the SR6 is a 6-axis robot, the load is distributed across multiple motors. The rating refers to stall torque (kg/cm). Think of it like holding a heavy weight: if you hold 35kg just 1cm away from your body, it’s manageable. But if you extend your arm (making the lever longer), it becomes harder and harder.
In the SR6, the servo arms are relatively short, meaning even the 35kg servos provide significantly more force than is actually needed to move the stroker. The bottleneck isn’t raw power, it’s speed and heat management. Increasing the torque to 45kg is like putting a semi-truck engine in a small car, you have more power on paper, but you can’t effectively use it, and it often just results in more heat generation without a performance benefit.
Same goes for the Three Axis OSR or other machines. the Servos are more than powerful enough it´s the speed, noise and heat dissipation you need to worry about.
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Going to give this a try after my last SR6 literally caught fire after turning it on one morning 
- Order number:13036
Just a quick heads-up for anyone following this thread:
MiraPlay AiO has received a v1.6.0 update, adding new motion recording and playback features built on Gesture Sync.
If you’re interested in what’s new, there’s a detailed breakdown and demo video in this thread:
MiraPlay AiO — Smart Engine for OSR Devices (Updates Inside)
Would love to hear any feedback after you’ve had a look.
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Oh wow — that sounds scary, but we’re glad you’re okay 
Hopefully this one gives you a much calmer start to the day.
If you run into any questions while setting things up, feel free to let us know — happy to help.
Thanks again, RUKA！ I really appreciate you taking the time to explain this so clearly.
I have to say, your explanation of the servo mechanics and thermal behavior is extremely professional, and honestly, I don’t think I have much to add on top of that.
To be candid, before this discussion I hadn’t fully realized how much attention users place on thermal performance. Your comments were a good reminder for us, and we’ve already started strengthening how we describe and explain our cooling and thermal design.
That said, I also feel that written explanations alone may not be enough. Rather than relying purely on descriptions, we plan to run some additional tests and share the results publicly. This isn’t about showcasing superiority, but about openly exploring the thermal limits of MiraBot together with the community — and seeing whether there’s still room for improvement.
I also want to emphasize that we have no intention of offending or targeting any other vendors. Every product in this community has its own design philosophy, strengths, and trade-offs, and everyone is working hard to build better devices. Identifying and discussing limitations is not a bad thing — it’s often how products improve.
We genuinely encourage users to compare products across different vendors and choose what best fits their own needs and usage patterns.
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