i have an aftershock 3.5 and i spend more time trying to make it stay running than i do driving it, i spent 3 or 4 hours just trying to keep it running out of the box, they didn't have the low speed needle set even remotely close, it wouldn't even sputter for the first hour, now once i get it tuned, 3 or 4 tanks later it just keeps pulling the same thing with dying every 2 seconds. I read another thread on here about the aftershock 3.5 as their first nitro car almost give up the hobby cause of the thing. I see where they are coming from. Second tank after break in stripped the spur gear, i replaced it with a steel gear, and they didn't use threadlock on anything when they made it