I ended up disconnecting all the control rods from the control surfaces and putting all the trims and subs to zero. Then taped the surfaces perfect centered and adjusted everything to fit the horns. All hooked back up and surfaces still centered level. The buzzing in the flap servos are gone, so I'm satisfied. Now a prop balance and get cg right. I'm just going to do the finger tests for cg, at around 63 mm(half way between the suggested measurements and see how that turns out. Hopefully just have to move the battery back or forwards. Other than that, I think I'm a day from maiden.