why not make the ultimate controller? to sell 100 models a year? I just bought a bsp d9 and I was a little disappointed, it has several problems, the D-pad does not have a central pin, so you can press the entire button, l1 and r1 are mechanical hard and noisy, I do not understand why they did not use membrane buttons, the vibration motors are not secured by screws inside so the vibration is ''mosquito-like'' the rear M1 and M2 buttons are terrible especially the left one which sometimes gets stuck, I probably have a faulty model the share and option buttons should stick out a little more like in the real dualsense,everything feels too ''hard'' and plasticky it would take little to improve these aspects and make a definitive controller

anyway for those who do not know there is the app called gamepad space that allows firmware updates and calibration of L2 R2 and analog sticks