Hi Mark!

I use JR8411 with futaba without a problem. But for example the 4421, 4041, 4021, 4621 do not! I didn't try other servos, because I can switch to a proper radio gear, depending on which servo I use.....

And it is very scarring if you turn on your tx and your rx and all servos run wild. Moving the sticks will stop them, but will you fly with such a system?