Blitzer Beetle pinion gears: 13T/15T Bear Hawk pinion gears: 15T/17T 15T on Bear Hawk is equal to 15T on Blitzer Beetle. So the higher Bear Hawk gear ratio is equal to the lower Blitzer one. If you want a BH with a high gear ratio you can keep Blitzer gears and use the 15T pinion. If you want a BH with low gear ratio you must change the gears. Differently with Ta-Mark I believe that the both gearboxes are identical so you need to swap only the gears. For the body yo