I forgot to mention, I just forgot, there is one big issue with ps3 thumbstick. It has low resolution, Like voltage output on each axis is low. It doesn't go from 0 to 5v, but from 2,4 to 2,6. It needs an amplifier board for full voltage range. It can be calibrated and it works, but I'd like to make it better. I designed a small pcb with opamp, I'll post it soon on OSH Park.

Good thing is that pcb is very small and can be installed easilly inside any grip.