Right on man! . It feels real nice when it starts to work outWell after I finally got got a few spur gears in and had time to sit down and replace it. It appeared to be more of a mesh issue. the tips of the spur were stripped but still lots left on the gear. I think maybe an impact misaligned the motor/pinion. After I tore down the slipper clutch to replace the gear, I broke one of the meatal pieces of the slipper then tightening it back down. So then I just went and bought a whole freaking assembly. While I had the change I also adjusted the alignment of the front wheels and and put locktite on the back of the hex and the the wheel nuts. I threw in a 25Kg servo from amazon and replaced the the little drive shaft brace that really doesn't appear to do much as it ran fine without it. I put 2 packs through it last night and it runs like a champ. I also DIDN'T break anything. I think I'm starting to get the hang of things!