The last two nights I've completed reinforcing the fuel pickup, marked and completed two of the three cutouts for the flap hinges. Tonight my Dremel tool just gave up. I'll try to fix it tomorrow, but it's pretty difficult to cut slots for the flap hinges without that useful tool.
I'm also wrestling with the final fuel bays. Manual calls for 75 total gallons. But other folks say that's too small capacity, and that 90+ gallons is more appropriate. I'm all for that, but a bit short on specifics. Should have more info by this weekend.