Edward, do you guys modify other motors or just do your own thing? I have a fairly fresh MR-12 Novarossi motor that is just slow. I am not looking for a blistering fast motor because I have others for that, but just a good motor that has the power to keep up on smaller tracks. This thing is so slow, it can barely get out of its own way. I would like to get it modded sometime soon if you guys are interested. Also, what is the price for modifications? Thanks, Joe.