I'm making a live steam locomotive. The next cast is to be the trailing wheels. The drawing is for the original 45" wheel, but my project is 1/8 scale, so just under 6" diameter. I can't figure out what the pattern should look like. The drawing shows the hub, rim and spokes drafted to the back side. That would imply the whole pattern would draw in one direction rather than being split. But then how to I get the shape of the spokes at the front, as well as the hub extending proud of the rim? It looks like at the plane of the rim I would need to pull in two different directions; the hub & rim vs the front of the spokes. The part will be cast iron in green sand. I've made a 3d printed pattern with no split as a test. Aside from the issue above, when I tried molding in green sand, the sand between the spokes pulled out. The gap is narrow and deep, so there isn't much to hold the sand in place when pulling the pattern. Can I do this in green sand, or do I need to use something more robust? Any advice?