I bought the HPI MT 2 today I am just putting it together right now. What do you mean you keep breaking the diffs? Diff gears? The dog bones? What parts should I stock for fixing breakage out in the field? Diffs??? $$$$ Is that because of the added power of the .18? Can you describe to me how the power characteristics of the .18 are different then the stock .15. If you had to give a % figure to describe the increase in power of the .18 over the .15 what would you guess it would be?