My partner has almost decided that he cannot fit his 6'3" self in the C150 much longer. But we heard that there is a modification of the seat that can move the 'seat back', back another 3" or so. (Of course the seat tracks cannot be moved back due to the mechanical structure of the floor). Supposedly, the idea was to move the seat padding behind the upright supports to give the pilot more room. Has anybody heard of something like this?