The day
after I notched my F-705G latch angles, I found the answer to my own question, at least for slow builders, on DWG 20, F-705 BULKHEAD ASSEMBLY. Note 5, referring to the F-705G, says "...
DO NOT RIVET UNTIL SIDE SKINS ARE INSTALLED. DRILL AND CLECO ONLY".
This seems counter to the instructions near the bottom of p. 8-10 under
FINISHING THE FORWARD FUSELAGE AND LONGERON DETALS that has you "
Rivet both side rails, canopy decks, and gussets to the longerons." Riveting the gussets to the longerons includes the F-705G in the stack up. (The "side rails" and the "canopy decks" seem to be the same parts; maybe tipup vs. slider terminology?)
Now that I more fully understand how the parts in this area fit together, I'm thinking of remaking the F-705G latch angles. I don't really like the notches, and now I think know what to do to avoid them.
It looks to me like the riveting order in this area should be something like:
1) The F-774 aft top skin to the longeron.
2) The forward face of the F-705G through The F-705D, E, and F bulkhead parts. Access to the area is greatly improved without the gusset or side rail (aka aft canopy deck) in place.
3) The four rivets through the top of the F-757 gusset, F-705F channel, the F-705G angle, the 2 rivets through the longeron, gusset, and channel, and the 3 rivets through the longeron at the aft end of the gusset.
4) The side rail (aft canopy deck).
And looking ahead to the canopy, it might be best to have already fit the canopy frame (roll bar), and maybe the latch mechanism before riveting any of this.