I have a Juggernaut that I would like to convert into a rock crawler. I have looked online at different sites that sell these kits but I don't know if they are any good or what else I would have to buy, plus I'd like to see the kit before I buy it. I have asked around at different hobby shops but it doesn't seem like they carry anything. Has anyone built a rockcrawler or know if any kit is better than another?