I've just gotten bitten by the glider bug, but as a right arm amputee, I

I heard a rumor about a one-armed man getting his multi-ATP.
If the one hand is fast enough, there you go!

Someone on this group also mentioned the idea of putting
an extra notch for "half" spoilers in the Blanik L-13.

I'm willing to bet the FAA would bend over backwards to
help you and a mechanic and an examiner to make this happen.

Please let us know how it turns out...