Trying to cut the holes in the 1/2" HardieBacker did not go smoothly, and we needed a new tool. LD saw the Dremel Trio which was perfect for the work we are doing right now! It worked like a dream on the Backer and the subfloor.
The new plan is to install the shower pan and membrane this week, and get everything ready for tiling hopefully this weekend.
All the spackling finally inspired me to take care of the hole in the laundry room, which used to house an "outlet safe". It actually fooled me, I didn't discover it was a fake outlet until I tried plugging in an iron! The first thing LD asked me "Was anything in it?" It was empty.