Hey Spruce. If you haven't bust em out yet, be prepared to spend a significant amount of time working on them. each track link has TWO sets of holes you need to drill out. Not technically drill out, just using a pin vice to clean up the holes that are already there so the wire used to link the tracks together passes through nice and easy. But the fact that you have to do that TWICE per track link, and if you have 220 links (like my Tiger I tracks), that's 440 sets of holes to drill! Very very very tedious AND repetitive. But the end result is amazing as well as the nice weight that it gives your kit.