Robk you hit the nail on the head ...and titanium screws .....not listed in the rules....I perfer the Cirtrx motors by speed passion we used to run in rcgt...Totally sealed not rebuildable, 21.5 very equal racing....top racers stayed away from that class cause their was no edge to get. Bodies looked realistic and no matter what you did you got no advantage so people would run a variety of bodies.....fun class...I think paul should weld every one shut.......lol