A couple of not straight lines there,and that only tells you how difficult it is to perform precision aerobatics even at this skill level.Very educational on manoeuvres thank you very much!!!
There's something called "manoeuvring speed" (the yellow arc on the speedometer) below which a pilot can make any type of full deflection of the controls safely without risking damage to the aircraft.
Jerzy, what glider are you flying? It has a vey crisp and rapid roll rate so I assume a much reduced wing span. No it doubt accounts for the lack of adverse yaw for such deep aileron input?