OK, here the piece rests, scribed into the surrounding wall, and screwed into base from the bottome via pocket holes I drilled a long time ago. I've dreamed of this day for a while as this is a perfect crash-pad for napping after a long ride or run. With prep for Oakland's Marathon up in March, It's nice to have this thing done when I begin the longer runs starting in December.
The walls are a deep red color and it makes for a pretty dark room. This might seem too dark and dreary, however the rest of the house is so brightly lit, that it's nice to have a room that is a foil to that. It's quiet, and also stays cooler during the summer months.
Here's how the trundle is deployed, using pulleys rigged on the interior of the base. I still need to make a handle for the cord. The trundle rides on six 1" non-swivel casters.