I decided to attach the baggage floors with screws and nutplates instead of blind rivets like the plans call for, so I can put the strobe power supplies under there and still have access later. These are just some "before" photos I took for my own future reference. Looking forward from aft of the baggage bay:
Overhead view of the port side baggage floor:
Looking aft from the area of the pilot's seat:
Overhead view of the underfloor area of the starboard side baggage bay:
I put in the three pop rivets per side that attach the F-750 aft baggage covers to the sidewalls. These covers are already partially riveted in the QB kit, but they leave you these fasteners to put in. I wonder how they thought you'd go about deburring those holes? Luckily, I have this handy Burraway blind deburring tool! It's pretty nifty. You can also see where I got myself with a roloc pad in the die grinder a couple days ago. Gruesome, eh?
Hand deburring bit plus angle drill equals backside-of-rib-flange deburring rig.