Pigpen

Strange. I've just tried it and the issue seems solved to us. No desync between hand controllers at all.

This is precisely the issue I am having and reported elsewhere. Have tried the same troubleshooting as the OP with same results.

I have been having the same issue. In single player both players can use the hand controller fine from either seat. In either a large MP server (hoggit) or private server the hand control jumps around as if it is double bound and we get lots of desyncs messages making it unplayable. Affects both the radar curser, mav slewing and radar curser. We have tried removing all potentially clashing binds, tried buttons instead of axis binds all with no affect. Any ideas or is this a bug. I did a lot of googling and can't seem to find any other people with the same issue which seems odd.