Thanks for the info. I only have the one and if I Ever get a 2, I'll stick with its controller. I don't need any more technical difficulty. Be safe.Yes you can use a 2 to control 1, but not the other way around, even the 2 to 1 has problems, locked up my compass calibration on the 2, had to reinstall firmware, not tried since as no point.. different boards inside. Ta