If you've ever reshaped a mid case, one of the toughest mods to do properly is being able to cut bevels that have crisp/sharp edges.
Here's an example of stock Yuki 5513 case lugs. Note how the edges are slightly rounded and the satin finishing on the top of the lugs have bled over to the bevel itself. Not cool:
After spending some time on my lapping machine, here's what (I think) bevels on a 5513 should look like. Lugs have been slightly thinned, repolished, satinized, and bevels cut last: