I spent today machining the front side of the crankcase front. I am pleased with the important dimensions, but I think the surface finish could be better. This is when I wish I had a bead blaster, but I don’t have room in my little workshop and can’t justify it for how little it would be used, but …. I will ream hole for the crankshaft bushing. I use fusion360 to generate my tool paths for the router. I am not sure what people are interested in seeing, the CAD design? the CAM and tool path programming? or just the odd shot of me making chips. If anyone is interested in building this engine, I am happy to supply any of my models or tool path files. The photos show the aluminum part compared to the 3D printed part I used for initial prototyping.