I tried a bunch of desk mounts, and the undisputed winner is https://www.amazon.com/gp/product/B0C2TX65YN It pretty much doesn’t have any give at all. You don’t have to worry about having it tight enough where it would slip. The way it is designed, the tightening teeth in the joints lock it into place after a certain point. This makes it vastly superior to any ball and socket joint mounts like the official one that was released by Handy. This one NEVER slips.
It can be used with the Handy Handsfree cup https://www.amazon.com/gp/product/B0BZVTT4SM, although the plastic begins to break under limited usage. What you can do though is cut off the part that tightens it and take a hose clamp and wrap it around the entire cup for support. Super glue any cracks that develop, and mine now has lasted a long time with a lot of usage. I don’t have a 3D printer, so haven’t tried one of those options, but assuming those are durable, that should be a good replacement.
If you want to turn it into a blowjob machine, I recommend https://www.amazon.com/gp/product/B073GZFDDL You need a longer strap than the original, the Handy TrueGrip PRO Band works very well: https://www.amazon.com/gp/product/B0BGFYD6TK I used a dremel tool to modify the plastic shell and scissors to cut the sleeve to exactly how I wanted it.
This is what it looks like unmodified:
It can be used that way too, but I modified that to be open ended because I like the visual aspect. If you cut it at the right place, you can see the uvula which adds to the excitement.
The other vagina side can be used too, you can modify it anyway you like. This dual combo mouth/vagina sleeve is only $20, they last extremely long, and feel pretty damn close to the real thing, both the mouth and vagina. Also not as bulky as a Fleshlight, so works better to be modded with the Handy.
To slightly elevate the plastic shell of the sleeve higher to not hit the hoseclamp, I used a stack of velcro to raise it up a little bit.
For any desk clamped solution, I believe this is the ultimate setup when comparing what I have seen from everyone else out there. I’m pretty confident that most people that are searching for the best mount will proclaim their search is over once they try that mount.