i got to say i was very disappointed with this kit. first i think they need to go back and redesigned, there was way to mush clean up and some pieces where broken and did not go together well. even if you get them together then broke apart when you tried to get the on the tank to the pion i gave up on it and went back to the rubber tracks that came with the kit. pros: they look nice once you get them to stay together. if you want to try this kit please do i hope i just had a bad kit.