To my pleasant surprise, the above-referenced axle nuts came off very easily.
Now, as I am about to remove the driver's side rear caliper, I notice there are 2 normal 17mm bolts on the caliper backside, in additon to 2 hex cap bolts in their own little rubber housings with plastic caps on them. The Bentley manuals say to remove the normal 17mm bolts, but the 101 Projects book says to remove the hex caps. How best to procede?