Just picked up one of these
https://www.mscdirect.com/product/details/00069971
new surplus on fleabay for under $100. I don't have any specific plans for it yet, as I have an MC and a Lipsey's 5-inch half-lug, but it seemed like it might be a neat problem solver to have in the tool chest at some point. I measured the Lipsey's gun before buying, and its barrel is really darn close to 0.75 in. diameter. Maybe the world will need a shaved-lug 6-inch down the road.