The top section was more difficult to tie down since there were no openings to use. I had to clamp it on about 1/8" of the outer lip. That's all I had to work with, since that lip also had to be cut. The cutter barely cleared the clamp! I was worried that the lip might fail during cutting. I've seen castings let go during cutting if too much material is removed, but this time everything went well.



I also had to shim the casting up with cardboard because it was warped and wouldn't lay flat.