I got the kit completed on Saturaday, just ESC and receiver install left to do. The car went together pretty well, I used a stainless steel cap screw to tap the other 2-56 holes and that went better. Also I must say CRC has good support with fast shipping, got spares on Saturday just in time to finish.
I used an associated TC5 spur, and the dia. of the diff ball holes is .020 bigger then the kit CRC gear I got (.010 per side). This looks OK although its very near the outter edge of the ring...I'm going to try this week. Also there are 12 holes for the .125 balls not 10 that came with the kit, so I'll be running just 6 diff balls to start. Open diff looks to be high maintanence...possibly 6 balls is better??
Any suggestions on best tire dia? I've read that over 2.25 traction rolls on others models (carpet). The CRC ones came in at 2.380.
I'll get some pics and first impressions later in the week.