Hay I thought this was a woodworking forum....how about MAKING the adapter
from, say, WOOD ??? Before you flame me, that's what I did, also the tapered
adapter's about 8 bucks, scrap wood is free,at least around here. I used a
chunk of Mahogany glued up to a piece of ash. Simple project and a REASON to
keep so many cutoffs around here!
As other's have said though, open another 2" port or you'll stress the vac
motor.
Jay