Just upgraded the firmware to 18.104.22.168. Using iOS 10 Result was loss of linkage from Master Controller to Slave Controller. So 30min later after relinking both FC to the aircraft, and then going to M<aster R%C/Slave RC setup all seemed well. Slave RC moved camera OK. So time to check camera operation on Master. Camera Up and Down on left hand wheel OK, but nothing on the C1 and C2 buttons, So back into the settings to find C1 and C2 unassigned. So I assign them for camera movement result NOTHING. Switch everything off and on, and try again , Result NOTHING, no movement So, anyone else had this problem of using C1 and C2 on the Master to control Camera L to R ? Did you manage to resolve it?