Well, I was just having a thought about the sprocket wheel. I have to get some time tomorrow and draw something up so I can measure out for a track link length and then draw them up.
Now for the sprocket wheel, I was thinking of making the teeth themselves a bit heavier than normal and then another thought hit me........ (well not really hit me) since these are toys rather than exact replicas why not modify the sprocket wheel a bit more. rather than having two raised rings (or what ever you want to call it) with the teeth on them, why not have 3? make the 3rd one be right in the middle? it would reduce the stress rather than having 2 teeth pulling on each track, there would be 3.
Now all I have to do is figure out how to cast it if it where to be made like that.