You really need to do the wheel bearing modification that I do. Otherwise the wheels eat themselves. Since its the static chassis I assume you can use tamiya tranys but those are very hard to find now so you might want to do the mods for henglong tranys, or if you want, I will sell the ETO trany I had Bob make for me. I have perfected my own install with jigs and such so well that I do not need his tranny now. I prefer to keep all my models the same as I build them. Its nearly one of a kind but it is super nice and robust. Just an offer. And I want to see a build thread as you go with your Gepard.