
It was clearly the keyboard encoder in my HotRod SE that was causing problems with some button/joystick contentions not the joystick/button hardware as everything now works correctly, without the issue with left/right movement getting "paused" by pressing the main fire button. I was expecting to need to replace some of the micro-switches!!
Unfortunately this does now make it much harder to justify buying a new controller...

Cheers,
BeeJay.