Your getting to involved. I just take a bunch of them , glue them together, wait a few minutes, then shape them around the sprocket. If they look right, glue them down and build some more. I build one long section to go straight across the top, glue it down. Next, build a bunch, wait , then curve around the rear idler and glue down. It's really easy, I've read many different ways to do it, but sometimes the easiest is to just jump in and try it. Not recommended for children under 13. LOL
"It is well that war is so terrible, lest we grow too fond of it."-R.E.Lee