This past Saturday, I started training in a Schweizer 2-33A glider.
When I got in the glider for the first time, I found that I couldn't move the control stick fully left and right, because my legs were in the way. I could only move it about halfway. I could move it fully forwards and backwards, though.
Is it safe to fly a glider like this? I asked my instructor about this, and he said it was fine.
Normally, you're not going to use full aileron deflection anyway, unless the glider is on the ground and moving slowly.
On the other hand, if you get into an unusual attitude somehow, then the limited aileron travel could increase the amount of time it takes to recover. But I don't know if that's a realistic concern.