Thats some great work there, Tim!
Im too unfamiliar with this tank to comment much. But your scopes look good - nice and clean. Patton's seem to have too much drilling damage, maybe better avoid that and keep them as they are. Maybe you can gloss coat them or something to give them a glassier feel, Im not sure, reproducing glass is a pain. There are also some semi-transparent paints for doing tail lights and such, if you can find a suitable color maybe paint a base coat of silver and top it with the semi-transp.
The cloth roll is great, but try to find thinner ropes - these are thicker than the tow cable on the back.
Looking great, cant wait to se it weathered!