Great info guys. Normally I would have gotten flamed for this kind of questions. The reason for the bodiless chassis is meer looks. I have always wanted a custom looking tube rig. As for the worm what are you refering to exactly? Also, what are comman things to go first as far as factory parts? Thanks again guys.
The Losi based rigs have worm gears for the differential on the axle. Where the drive shaft connects to the axle housing. You need to open the axle housing and make sure that the worm gear and locker are lubed well.
Great thread on it.
http://www.rccrawler.com/forum/team-losi-comp-crawler/288927-shimming-hd-worm-gears.html
Another great thread on reducing friction.
http://www.rccrawler.com/forum/team-losi-comp-crawler/414056-tip-how-reduce-friction-lcc-lnc.html
As far as what goes. The worms, if they are not lubed regularly. Everything else is pretty solid. I have had very good success with it. The stock LNC electronics will probably be the first to go.