I spent much longer than anticipated on trying to figure out a piece of equipment installation. Round in circles but eventually I did it. Phew! 
We walked to Harrison Park again and it didn't seem to trouble Donald's legs, so that was okay. Couldn't get a carryout coffee from the little cafe nearby because the machine was broken but that's in any case just a nice little thing to do but not life and death necessary.
All the usual routines of the day and I find that helps Donald to be orientated.