Here are two carriages that I cast with the CNC cut pattern. I made two in case i screwed one up in the machining process. These were the first parts that I made using my new Petrobond sand. The surface finish that Petrobond gives is night and day compared to green sand. The pattern was made from MDF and coated with Polyurethane.
Some images of the castings.
Some images of the machined and assembled carriage.