Further testing : reinstall FSUIPC (V481) and try the FL350 thingy : it seems to track well even at high FL so kinda problem sorted BUT : I immediately noticed that things were not the same compared with fresh repair of CS 767 WITHOUT any FSUIPC in module folder (where is CS limited FSUIPC installed BTW ?) the A/T are always overriden by actual joystick position, EPR (PW) or N1 (GE) actual vs. target values are way off during TO, CLB or CRZ phases) so that I again deleted FSUIPC (V481) from module folder, repaired CS767 and tried again : This kind of solved ALL problems, now the bird is a joy to fly. (especially the A/T issue constantly overriden by joystick was a bugger for me, now it is perfect) SO for all the people having A/P issues I would advise first to get rid of any FSUIPC in the FSX module folder, then quickly repair CS767/757 base install and have a try from there.