135 needs
Chopper spotter, dolly, trolly or movable pad as the ground handling wheels were designed by the Germans to get back at the French for loosing WW2 (the big one) and the 135 is a real "pig dog" to move in and out of the hangar with literally any fuel on board. Oh, and maybe a pilot seat that goes up and down a little bit as after about 2 hours ones legs tend to go to sleep.