In reality this is non issue! Control throws are not that critical on a high winged trainer and as long as the C of G is correct you can use anything from 5mm to 15mm up /down measured back on the ailerons and elevators. On the side rudder you can use what ever pleases you. You alter this after the first couple of flights to your own preference!
But on a Q-500 type pylon racer (span 130 cm and 6,5cc engine) it is another ball game...here I have 3mm elevator throw measured back at the elevator and 5-8mm up/down measured back on the ailerons.
Side rudder throw ...as much as possible.