Dennis, that works fine when installing the lugs and pipes when the stock is still square.... on a precarve or when you build an Alzheimer's gun and shape the forestock before installing the pipes............ the pin vice is actually very quick and easy...
Drink more coffee doc, helps prevent & reverse Alzheimer's.
To help prevent wandering and backside blowout, use a parabolic drill having a four facet 60-65° split or back-ground (thinned web) point, 8-10° chisel relief angle, 5k minimum spindle speed.