I upgraded my Tronxy X5S to an X5SA with a factory upgrade kit and decided I would do my normal thing and do up a better enclosure then factory setup. I also wanted to mount the Z parallel adapter. next to the control board... then I use smoothers because I already have them so why not... Now all the items mount with m3 bolts... I think I used 8mm long m3's Now because I wanted the have the Sd card slot facing upwards and I wanted the smoothers towards the back and away from the control board you will either have to make longer jumper wires for the parallel adapter and smoothers... I didn't worry about this because I tend to make my own cables anyway.