I am really intrigued by this, but man that price tag is rough. I’m not sure how I could justify not just getting an OSR at that price point.
I’m guessing something like this isn’t even worth comparing to the real suck-o-mat.
If you wanted to extend the sleeve to take advantage of the Handy’s full stroke range, do you think you could take a thin sleeve like this (these are actually my favorite daily use sleeves and here’s my post on how to secure smooth sleeves to the Handy strap), cut off the top, and then pull it over the lower part of the suck-o-mat sleeve? I understand what you’re saying about the sleeve being tuned to the machine which is why I’m asking.
If anyone is thinking about this, and is also looking for a hands free setup, check out my post here. The looping gooseneck design should be perfect for hanging a toy like this one. I made the gooseneck on mine more rigid by taking some plastic tubing, slitting it up the middle, sticking it on the gooseneck, and then wrapping some tape around it.
I’m seriously not trying to spam my own posts. 
I just hope someone might find it helpful.