Just looking at the inside of a set of 78 750F cases and I realize there is much that could be cleaned up. There are a lot of burs and thin sharp edges around kiss offs (where the molds come together to form holes inside the part) as well as many sharp edges that could be given a 1/16" radius. My limited engineering has it that sharp edges create or are areas of stress.
Do the big foreheads recommend taking a file and sandpaper to the inside? At the very least wouldn't cleaning up the cases make oil flow back to the sump smoother and more efficient?
