It took forever for the Proseal under the cowl hinges to cure, so I couldn't do a trial fit on the cowl until today. I was worried that the thickness of the Proseal would screw up the fit, but it went on perfectly.

I bent the forward end of the hinge pins so they wrap around the shank of a countersunk #8 screw, which will go into a platenut to secure the hing pins. I'll cover the screws with nice stainless steel covers made by Dale Lamport, a prolific local RV builder. Thanks Dale!