very cheap circuitry^^ Go with Novak, GM, or Tekin, they will last forever

it is referred to as a mechanical-resistor type speed control.....total old school, but neat to watch it actutate, I would look for a used Novak Cyclone on E-bay, I think they are 450 continuous amps forward, they rock hard

that's a cool kit man, I would love to see pics of that once you are done, I use to run modified RC10's with Race Prep motors way back in the day At R&R Hobby, I met Jay Halsey and Cliff Lett when they were running RC10's at R&R for Associated, After the RC10, I went to kyosho Optima 4wd......good luck on getting that baby going........Old school vintage ftw