It's a strange feeling seeing your own design in someone else's hands ;)
Any thoughts on things to improve? I recently made a grip for my original 3ds as well, it's pretty much 1:1 with a 360 controller and it's made me realise just how large the actual grips are on the vita one.
I could see the handles being slightly smaller, however I have fairly large hands, so it doesn't bother met at all.
The overall design is great, it makes my vita so much more enjoyable, and since hacking it, I have been using it a lot lately.
Glad you like it. Maybe one of these days we'll get a handheld that's actually been designed to be comfortable. Satisfying as it may be to make these, one really shouldn't have to.
Most of my parts I actually used a soldering iron to heat weld the edges together, and it provides a very secure fitment of all the parts.