Well - it's done - finished everything up this weekend. Got all the edging stained, filled, poly'd and mounted, including an iron-on veneer for the edge of the liftout, itself. All wiring finished, including the accessory hook-up from the KW on my workbench to under the reversing loop. Installed some "half" portals at the closet tunnel entrance/exits and put the yard light back in place on the upper main layout. I also put an old Plasticville Union Station, Ho-Jo's (wrong scale), cars, and some trees and clump foliage on the reversing loop so it doesn't look so bare.
The attached pics and movie go from right to left from the main layout across the liftout, through the closets, along my workbench and out to the reversing loop and back again. In the movie you can see where the train goes straight through the liftout from the top of the main layout but takes the diverging route to the main on the way back.
I've already cut-out a 24.5" diameter cardboard circle to get an idea of where a TT might be placed inside the reversing loop and, if I end up getting one, I will start a new thread to track that installation.
This was a great winter project and thanks to all who followed/liked/commented and a special shout out to Jan and Dave (sounds like an old California rock duo) for their design assistance. Couldn't have done it w/o you guys - thanks !!