Still not being very productive, still feeling fairly weak and don't have much stamina.
Practiced tapping on various materials, including an aluminium ingot filched from #1 son's workshop.
Drilled out the seal retainer holes in the crankcase to 1/4"UNF, and reamed out the plates to 1/4". Painted them a snappy grey, then bolted on with AN-4 bolts that are a bit long, but only have two washers so are legal.
Played with brake covers a bit, applying a bit more fill.