One word of caution with the Impact tracks. DO NOT RUN THEN TOO LOOSE. They WILL start to spit pins. I had atleast ten on each side work their way out at Danville this past November. Now I will need to CA each one. The problem seems to have taken care of it self since i took out a link from each side, but if you do not keep tension on the tracks the pins can start to float as this is what happened to mine.