Update to any BeastX users: Not to get off topic but, I spoke to the folks at BeastX.com. Pay close attention to the setup menus if using the V5 firmware. There are a few steps that are different and a new step I haven't seen. In my case the 4th servo will plug into ch 7 however ch 7 is signal only so the servo will have to be powered elsewhere. Just thought Id share my new insight...lol
T