I was thinking I might switch to 18 cells. I ran it for a bit on 14 cells and it was a dog compared to 20 cells. I also started hearing clicking from the rear diff. Took it apart....diff done.....brand new Ofna 1/8 buggy diff. LOL That's power. So I just ordered an 8 spyder from UE to replace it. If that goes then I'll get a Ford 9"!!!