Well, I got to thinking...because I should have made it 6" longer, with a little more down and a little less differential between layers. Why not make it into a true 2/3 UQ. This would condense the down, prevent shifting, making it warmer. Heck, I can always make a full length UQ.
So...snip, snip, sew, sew...here you go.
Now it is 48" long(not including the drawcord channels), still with 5oz down, and toasty to mid 30's. I folded my bpl thinlite ccf pad and put it inside the foot of my sleeping bag.