My son has a Granite Mega stock with just 6cell batteries. He wants it to go faster but I have no interest in going LiPo right now. He's not responsible enough to handle them and I don't feel knowledgeable enough as I'm also an RC novice. So is there a good brushed motor I can throw in the Granite with a 7 cell and maybe the 18 pinion spur gear to increase the speed a little, or is there an affordable brushless system that would run well on 7 cell batteries if we upgraded to the 7 cell as well? Also not had much luck finding 7 cell batteries with the deans connector. Any suggestions there ? Thanks for helping a n00b !!