I have been running the R9R on mine because I like the looks of it. It is performing very well but I do have an LTC-R to spray for it as well. I am looking into putting a gear diff up front as well, just haven't gotten around to it. With our low grip it eases the transition and helped my Serpent quite a bit. The Mi5 was already better and if it sees the same improvement will likely be unstoppable at the local level.