By now I've cleaned up all of the track parts (two per link), and then put the spare links onto both hull sides:
Each of the six sprues has one link in a certain corner, which didn't come out of the mould wuite right: the eye is torn on one side, the same on all six of these links. I therefore used these for the spares, with the retaining clips made from some plastic strip and a punched bolt head.
The track itself is easy enough to build: just put two outer parts together so that the pins on one fall in the groove on the other, then glue the inside on. Put a drop of glue where the yellow arrows point to:
… and then press the inner part on — taking care that it's the right way round, because it can be put on in reverse. Also be careful not to use too much glue, because you don't want it running to the pins.
By the time I had just about doubled the length of this section, I noticed that one link came loose. That proved to be because there were no pins on it, and on closer inspection, I noticed the things I circled in red … Each sprue turns out to have one spare link that already has the retention plates I made myself :? Luckily, the glue wasn't dry yet so I could get it out and replace it with a normal link.
In the past, I've also built this type of track from Trumpeter, and found those easier to put together (links in one piece, with pins you push in from the sides) but these Asuka ones have a hollow guide tooth that Trumpeter's lack (but which is hard to see). On the other hand, Trumpeter's tracks don't need any glue, so you can't accidentally stick two links together. I don't think I have a preference for either of the two for a future model.
For the back of the hull, I've also finished the blanket rack:
It's resin, and judging by the paperwork I got with the pile of Sherman parts, it's by Formations. However, it's lacking the stowage for the gun-cleaning rods. That's not wrong, because it was only present on later Shermans, including all 105 mm HVSS tanks, both M4 and M4A3 — though on those, it didn't hold any cleaning rods, because those were carried to the left of the engine deck. Since the main reference picture I'm using of these tanks on Okinawa show the empty rack, I added it from some plastic strip.