I cut the foots first, usually about 2” long. I chuck them up in my drill motor and use a double cut mill bastard file I get the edge down to where it could cut you. I smooth up the foot with my single cut file. I try when gluing them on to smooth the foot to shaft edge as much as possible as well. Messy, yes.
There is one target face we have come to dislike because even a shaft that has an insert that is above the surface of shaft hangs up. Those are those Morral faces made from that cross weave plastic material.