I was out driving my Nitro truck and this guy came up to me and wanted to know why his truck would rev to the moon but wouldnt move. I looked at his truck and all his teeth were missing on his spur gear, i showed him my spur and told him thats what a gear should look like. he didnt beleive that was the problem. he said he was gonna drop it off to the hobby shop and have them fix it. people, if you want to learn, let the person teach you, dont just drop your truck off somewhere