Just completed my first conversion and I think it went pretty well. Here are the spec's:
Hyper 7 PBS
Feigao 9L w/ heat sink
MambaMax
13t pinion / 46t Kyosho spur
5000mah 4S LiPo
Spektrum 2.0 Radio
The hardest part was, of course, figuring out a way to mount the battery. I eventually just screwed on an angled bracket from Home Depot and used some (industrial strength) Velcro. It seems very secure. See the following pictures below.
Just took it out for a spin and I'm very happy with the performance. My cousin, who has all nitro cars/trucks such as the Revo 3.3, was surprised at the acceleration and top speed. All in all, I'm very satisfied with how well the build went and the end result. However, it wouldn't have been possible if it wasn't for this forum. I'm not sure if I ever made any posts but I've read so many of yours and learned a LOT. So, thank you. Tell me what you think and feel free to give any suggestions that would improve it in anyway.