Before I *lucked* into some Mendel printed parts, I was trying to think outside the box and decided to play with mold/casting some. There are 6 Frame Vertex parts that take about 2 hours each to print. I happened to have one as a sample that johnnyr gave me.
I was actually surprised with the results. I'd never tried this before and definitely learned a few things. I plugged 2 of the holes with clay before making the mold so that I could remove the part from the mold after the silicone rubber set. I pushed the clay in far enough so that it would make an impression (which would help with the drilling after the cast was finished). One of these has been drilled out - the other hasn't yet.