They are great little Dozers the D20A. Hope you can get the Tracks fixed. It's doing a great job.I have been watching the operations of trucks and bulldozer dumping dirt and rocks to fill in land covered by water for some time now, but I kinda getting this feeling that one of these days there's gonna come some heavy rainfall and massive flooding in areas that were covered up by dirt landfills, honestly I hope this will never happen, but I just have this feeling.