I was thinking about buying a track cleaning car then I thought maybe I could build one. I cut and bent a car weight into what I thought might work for the cleaner head. I then added some plastic tubes that would slide the head in and out so I could easily change the pads. I also made some cuts in the head for the rubber bands I plan on using to hold the pads onto the head. Then I made a weight that would push the cleaner head down on the track. I drilled 2 holes in the car body and added some more plastic tubes so the head could be held in place. This is what I have so far. Went I buy some cleaning pads I'll give it a try out. I may even add a dispensing unit for cleaning fluid. I'll have to see how this all works first.