After some minimalistic pondering of the actual requirements for nose-only sizing, it appears that the only critical requirements are: a bushing being supported above a recess. Some way of supplying force at a reasonably precise angle. Some way to eject the sized boolit.
Ordered a Redding 73270 bushing last night. All that is needed is a reasonably sized washer to support the bushing above a deep socket and some sort of a ram, either a drill press or arbor press. Extra credit round is turning a holder for a top punch. All it needs to do is start the nose sized boolit enough to free it up so it can be removed.
I would enjoy being able to nose size some 280468S boolits to .270 diameter so they can be seated with ALL of the GC inside the neck on a 6.8mm Remington SPC TC Contender.... I really would...