I will run it with LIPO only.The lipos fit fine due to the TVP's being spaced out further due to the conversion. Im going to start with 2 4s packs. As for the spur/slipper, in the pics it is the stock e savage stuff 66t spur in 32p. But thos are older pics and it now sports a steel GP savage spur that is 47t and mod1 pitch. The gears in the center are stock but I have a full set of custom hardened steel ones in the works. Gonna run it with the stock ones first just to note on how long they last.