I've wanted to do the FRIULMODEL metal track links, so pick up some on ebay relatively cheap. I've been assembling them over the last couple of months, kinda tedious so they were on the back burner. well I was getting close to the correct length So I assembled the chassis to help figure out the correct length. Glad I did as there were a lot of left over links. I also used a number 76 drill to line up and ream the holes for the wire. I think the effort was worth the time.