I'm 5'9" and 220lb and fly a Ventus a with a winch hook. The fit is snug and I have to get quite reclined but am comfy for 4-5 hours at a time.

I've tried Ben's 2a for size and with no winch hook there was a lot more room. I believe the rudder pedals extend further forward in the 2s.

Biggest thing I've found with the 20 (and the 27) is there isn't as much room for my feet if the pedals are run too far forward. Haven't had that problem in any of the Schempp single seaters I've tried

Colin