Yes we did, and the seats do move aft & outboard - as far as is possible in such a dinky aircraft. To be honest there really aren't very many knobs or buttons you can knock anyway, that was part of my design objectives. If you can avoid stomping on the touch controllers then that's about it on the centre pedestal...
The cockpit was also modified for lower-limb disabled pilots, and for that the side pods are removed allowing the seats to move further outboard. Pedals were replaced with a yaw control built into the collective / throttle.