Newbie to crawlin' small scale, but anyone trashed the stock "ring and pinion" yet? Heard that there is an update for the WK to use a "steel" diff gearset. My rear one is toast. All I've modded is the lower links (front) and use of a brushless system and changed the electonics out for better gear. I've also weighted the chassis at different points to make a feeble attempt at lowering the "center point" of weight. Got a bunch of broken bricks, blocks, etc. to crawl on. Its alot of fun to do, but I'm just a little annoyed with the diff thing.