Check all control surfaces with gauge and set for recomended throws as listed in manual.
Harrier or elevator: 3D rates on tail. Thats 3" up elv. travel. AIlerons on a flaperon switch calls for 2" travel. Do not start at full 2" up. Reduce by half or less to start and work into a performance/comfort setting. Start small on ail. and work up. If you want to elevator down to a harrier landing be quick on the throttle at tail touch, a little throttle will keep the mains from slamming. Good luck, Joe