Thanks for the feedback guys. I apologize for the timing in thanking you but I had a busy spurt there for a while. That is just the type of information that I was looking for. I do run an aluminum idler now so that shouldn't be an issue. Beyond that the rustler is mostly stock. I run about 28mph now on 8 cells but I keep burning up my 14t SG Pro geared 12/87. From the posts it sounds like the bl system can be geared considerably higher. Any idea what appropriate street gearing would/could be? I'll probably order in a couple of weeks. If the 7018 still is out of stock is there any problem going with the 9918? Are there any huge benefits? Also, if I'm heading for a $200 controller should I consider the MGMs? Are they better?