The jammin .5 was a great, fun little truck to race and I had a blast with it. I was wondering and I'm sure you will have to test it first, but I was wondering if the truck is tougher tham the .5. I had problems with the steering posts and c-hubs breaking alot and I wasn't really hitting anything, mostly from some crooked landings and other truck contact in the corners here and there. Sometimes they would break for no apparent reason. We were racing indoors with ventilation so the air temp was always around 50-55 degrees so I'm sure the colder air made the plastic a little more brittle but I wouldn't think that much as to the truck breaking every other race. Let me know what you find out.