here is a question though, should the chains holding them together be attached close to the grouser(near the face of the tire) or down the side of the guide part(down the sidewall of the tire more)?
-Owen[/QUOTE]
Ideally you should always try and run the belting out on the tip of the tire to help eliminate chain bind in the drive train your problem will probably be trying to hold the wheel guide steady so that they dont just fold over and roll off the tire...in your case it would be much better to connect them at the tip of the wheel guide so that they are held firmly over the tire...this will also shorten the length of the track and reduce the number of parts needed...as far as chain windup, shouldnt be any issue with your design as the surface of a round pipe wont get enough grip on the tread of the center tire to do much damage.
There is a forum member that fitted an early generation of adair tracks on a max 2 with 21" rawhides and the pictures he posted will help you a lot to conceptualize your final design
Show us pictures if you get somthing built
Best of luck
Tim