Hi,
i have a quad with simonk esc and rctimer 5010 motor 15" prop, autoquad v1 r37. i fly well in manual and gps but after 5/6 minutes when i roll full to left the quad roll a little bit to left but if i roll to right the quad goes very much to right like the middle point of roll is decentered. Same with pitch, full forward from transmitter and the quad goes a little bit forward, full back with pitch from transmitter, autoquad goes very much to back...
Could be an esc problem?