It's neat to look through the manual; thank you for posting it. I'm happy to see that the tracks are different from their KV-1 and KV-2 kits - they have the guide tooth on every other shoe, and the shoes without the guide tooth have the split-link track. I don't know if that is correct for the JS-2, but according to Neil Stoke's book on the KV, it IS correct for the KV-1S, KV-85, and SU-152. All in all, it looks like a really nice kit.