I'm working on my Bravo 250 for the winter. My Bravo has worn out rivets on the body. What type of rivets are best for this? Also, I'm working on a short track body, in case my long track's body gets worst, I'll just switch over the motor, only problem is, there's a small rip on the track. I'm thinking of patching the rip. (my budget's pretty tight right now) Is this a good idea? any suggestions?