I worked on the cowl hinges today. First I trial bent the upper hinge parts to match the fuselage curvature. The hinge pins also get a slight bend and the ends of the pins are slightly tapered to aid insertion. Some builders use quik-lock screws for the cowling attachment, but I prefer the clean looks of the hinge method. Once you get the proper bend in the pins, insertion and removal is pretty easy and I think quicker than quit-lock screws.
Here are the hinges attached to the fuselage.
I was pleased that the upper cowl fit very nicely between the fuselage and the back of the spinner with no additional trimming.