I walked up the ramp on one in the hangar the other day. I am only 6' tall in my boots and could not stand upright. I was not wearing a bonedome. Would it have been that difficult/costly/impractical to have the cabin 6" higher. It must be murder on the back of the poor bloke who spends his time wandering around in the back.
In general; why do you bother with retractable wheels on choppers. With your limited speed I wouldn't have thought the weight/complication penalty was worth it
Mike W