I have a stack of four MaxTrax mounted to my roof basket with MaxTrax mounting pins. I had to do a little light fab work to get everything situated the way I wanted it, but it worked out fine. The only thing I don't like about the MaxTrax mounting pins is that the hole for the lock is a bit small, so I can't use a decent padlock on them. Work around is a length of galvanized chain through the hand holes, with a serious padlock that is hard to cut. Use some rubber or neoprene tubing around the chain to minimize noise and scratching. Aside from the padlock issue, the pins work very well and hold everything tightly.