Reworking this post a bit, since I fiddled with some of the parts, and got them installed. So, bottom line, the parts came out almost perfectly.  Only minor cleanup was needed on the plastic pieces, and the stainless steel came out extremely nicely, with only a couple small burrs to file away on the edges.  Top is my original, middle is POM, bottom is stainless steel. Sadly, they came out slightly different from my handmade patterns in two ways. First, the wing pivot somehow