I came up with a simple to build jig for my 10 "drill press that allows me to start the through holes on each end of the plug on plugs up to 12" long.
Here goes, first I swivel the table out of the way....
I took 2 lengths of two by fours and bolted them together. I then drilled 2 holes for bolts to attach it to the base of my drill and a large one inch diameter hole that is centered under the bit.
(there's a few pictures coming

)