I'm back, walked those stairs 2X's because I couldn't open her door. Dummy me, she lives on the opposite side of the hall than I do, albeit on the 3rd floor, and I was turning the key the wrong way.
Anyway, I did walk my 1/2 mile with the tape. Legs said I could do more, but the chest congestion said enough is enough. Next week I'll go for the full mile!