I've recently sold a horizontal mill and will soon have a new vertical mill to play with. I now have a large number of horizontal cutters (side and fence, angle, double angle, slab, concave, convex, involute, slitting, etcetera) to dispose of but, before advertising them, I wondered whether the smaller ones could be used on an arbor in the vertical mill, or whether anyone had found other uses for them. It's clear that the slitting saws can be used, but what about the rest?