In the instruction manual, Tamiya shows to install a C-Ring clip on to the spur gear. However, this piece often gets lost when trying to install it. So we answer the question, is this C-Clip absolutely necessary in a stock Frog? How about if you have a MIP (Moore's Ideal Products) Super Ball Diff hop-up installed? We dig deep into the inner workings of Tamiya Frog's ORV (Off-Road Vehicle) chassis gearbox in this episode of the RC Deep Dive podcast.