Inverted fuselage. Is not too heavy to do it myself, but it is awkward and will seek help next time, to get it on the a-frames I haven't built yet.
First thing I notice was a horrible mess of flox over the upper side of the ply braces and NACA bottom between the Aft Main Landing Gear Bulkhead and the Firewall. Just never occurred to me to fillet these nicely when I installed them, being preoccupied with getting them lined up from above. A wasted half hour grinding off what I should have just been able to glass over...
Cut out what was ever only formwork forward of F28. This revealed the merest whisker of flox over the end of the longeron doubler. All looks usable. Bits left over look too useful to throw away.
Broke my new dust filter mask. Got out the old one.