-If i could buy core logics and pots, happily would make my own, but i don't know how, that's even more difficult here.
You can. Use USB card like Leo Bodnar Bu0836 (8 axis, 32 buttons, HAT), or D.I.Y. Mjoy8/16 to eletronics (6/8 axis, 24/112 buttons, HAT) or similar cards, and automotive U-Joint for gimbal, and cheap HALL Sensor like Allegro A1321-EUAT instead pots.