Bruce, I've had tall pilots in the 2-33. Their knees are higher, they cannot get full aileron deflection without lifting a foot off the rudder pedal so they can put the stick under their knee. I'm 210# and the back stick will touch the seat belt buckle in the back seat. I can only imagine if the 300# can even sit into the front seat bucket, that the stick cannot be pulled full back.
BillT