What have you guys done to stabalize the XL

[Gee]

My god this thing gets squirly. I got a roller of ebay and put in a lrp .28 engine. It's a fun rc my first HPI savage. Had the front 16t bevel gear strip out on me and have gone through two more. Had it shimmed right until I realized the bulkhead where the bearing ride got worn when it first happened. I added some aluminum heat tape to increase the outside size of the bearing and that seemed to do the trick for now. But this think when you get it up to speed is like and elephante on stilts coming toward you. Swaying from side to side, little scary! Seems to pull one way or the other when it shifs so I need to work on the rear camber. I've got the stock tera pins on it right now. Is it something you just learn to drive or what? Is the Flux the same way?