I'm sure some of you would like some pictures to look at so here are 3.
First is the frame of my vehicle on the garage floor before welding.
http://kingstonemodeleng.com/vw/vw1.jpg
I should have turned the picture 90degree ccw for better viewing. Sorry.
Next is the "Home-Built Tracked Vehicle" by Larry Brown.
http://kingstonemodeleng.com/vw/track001.jpg
And here's the whole article about the vehicle.
http://kingstonemodeleng.com/vw/track2.jpg
Enjoy,
Bernd