Thanks credence. So a heading-hold gyro would be benificial on my blade with its wandering tail, correct? I understand I can't just add it to the 4-n-1, just weighing options as I may get the 2-n-1 and add my own receiver and gyro so I can use my 9C. In the meantime, if I adjust the gain on the stock gyro it may ease the wandering a bit, correct?