The 1st thing I look at when a quad (big or small) climbs out of control in PosHold is vibration issues. But since your quad has large props I would start there, make should the motors and props are balanced very well.
The 1st thing I look at when a quad (big or small) climbs out of control in PosHold is vibration issues. But since your quad has large props I would start there, make should the motors and props are balanced very well.