Few more details. Balance is 408mm back with hopper tank full and just a little fuel in the main tank (rear sump) I used the only accurate method to check balance!

Marius as his ailerons set with more up than down…which does not work for me with just ailerons (tailerons only come on with vector) I have 22mm up and 23.5mm down measured at the tip aileron. Ailerons are powerful, but not twitchy.