Keymapping on everything else is fine. Back is Credit on FBA-XXX so that works well, start is start. My six button layout uses A,B,X,Y and L&R triggers, I have black and white on 'shifted' (i.e. P1 start held &) trigger buttons, again this is fine. Hiding the interface is not a major issue for me, but I guess it could be handy. The biggest problem is one person credit feeding while another presses start which results in the game quiting...how about left analogue click being mappable?