Got some assistance from Michael to work on the F-609 bulkhead to F-674 riveting. A little tight and a little awkward to reach solo.
Then riveted the F-621 (A?) canopy deck to the longeron. Another tight spot. A lesson from Dan C's website - used the C-yoke of my hand squeezer (removed) as a bucking bar to reach under the F-621 channel.
Also, did a little more of the F-674 skin along the right longeron ... fwd half only. WIll have to crawl inside the tailcone to finish it.
UPDATE - was able to rivet the fwd portion solo with long arms and a little straining to buck and shoot. Did the same on the back half thru the F-609 bulkhead.