DOES NOT INCLUDE WORM GEAR AND I DO NOT BELIEVE IT WILL WORK WITH ORIGINAL ROUNDHOUSE MOTOR WORM GEAR. INCLUDES A STEP GEAR AND AN AXLE GEAR. HOLE FOR 3MM OR 1/8″ AXLE AXLE. WILL FIT ORIGINAL MDC AXLE.
DOES NOT INCLUDE WORM GEAR AND I DO NOT BELIEVE IT WILL WORK WITH ORIGINAL ROUNDHOUSE MOTOR WORM GEAR. INCLUDES A STEP GEAR AND AN AXLE GEAR. HOLE FOR 3MM OR 1/8″ AXLE AXLE. WILL FIT ORIGINAL MDC AXLE.