Door riveting and sanding

We final-attached the gas strut attach doublers in place, with both epoxy and rivets:

Applying epoxy (with cab-o-sil) to gas strut attach doublers

Epoxying the gas strut attach doublers in place

Gas strut attach doubler rivets

We then sanded all the door shell inner contact surfaces (where the two shell halves touch), as well as the cabin cover flange to let the doors sit flush. In one place, we sanded too much and had to fix it with more fiber:

Door shell corner where we sanded too much

Laying up fiber where we sanded too much

Fiber laid up where we sanded too much

Next is, of course, more sanding :) and getting the doors shell halves drilled together in place.

Time lapse:

Total cabin door rivets: 20

Total cabin door time: 29.4h