More done on the engine bed, got the side cuts on the first side done. The top ends of the vertical flanges will be cut back, so they are full width at the bottom and taper in to meet the side of the base at the top.
Then got to work on the other side. This is a bit more complex because of the extensions sticking out from the crank web openings. The solid block just left of center in this picture needs to be undercut - that block is there to form the angled holder for a frame post.
So, here is the engine bed so far, mounted back on the base without the plywood spacer. Next steps will be to lay out and cut the bearing block openings, and drill all the holes in the top faces for the frames and bearing caps. Lots to go on this part!