Well I know it's been said many times before but ... Please recognize
that many pilots of Std Class gliders will always start takeoff roll
with airbrakes open.

Having owned and flown an L-33 (glider type cited by Cookie), I never
needed to use spoilers for takeoff because the ailerons were so
effective at very low speeds. So was the intentional use of spoilers
confirmed or is this just another theoretical discussion?

Horst