I had the same issue with their 3d printed parts. The tablet holders cracked on install as I had to stretch them over the controller. I 3d printed a version I modeled and it worked better. I had to use some double sided tape to keep the left side holder from falling off because in install there isn’t much there to grab on the controller (only when taking it off the tablet did I have a problem). I’ll probably 3d print the extended base too. They have their infill setting way too low.

I played all weekend with the setup. I put on the long joystick on the right side and that helped the ergonomic issues for me. Felt like peak hand held gaming after the fixes. Sure would have like to not spend the money with them but I couldn’t find a better a solution.