@Lulu_2531513 thats because all the screw holes that can be used to lock the pad in place are close to one side, the three in the front are just to support the bottom of it. Also the print settings will affect tolerances. I have barely any play but my printer suffers a bit from overextrusion which I'm procrastinating fixing (edited)
Been looking forward to getting my hands on this since I saw your first post on reddit, thank you for sharing this great design.
There is one problem for me though (I don't think it impacts use though) when attaching my Azeron (mkii) the front end (side with all the buttons) can slide left to right a little bit, not quite sure why this behavior is happening. (edited)