6 hrs, 38 rivets
Finished fitting and riveting the oil door to the upper cowling. Got it fairly good, one small inaccuracy which will need adjusting. It will need some reinforcing ribs - the fiberglass door just flexes a bit too much under the tension of the hinge spring. So not really done with the door. Thanks to Wayne for supplying the soft rivets for the fiberglass riveting.
Then started on the lower cowl attach hardware. This is fairly straight forward, should only take 2 or 3 hours. Of course, there's already one part which may need doing over.