Worked on the left lower vent cutting the rubber baffle material to follow the contour where the cowl vent meets the plenum. Drillied #30 holes, and punched the rubber with an 1/8" hole punch. Stretched the rubber around the plenum so that the over-hanging 1/2" of rubber would be a smaller diameter, and seal properly. So far it's worked out. It takes a bit of wrestling to get the lower cowling in place. Not sure if I will do anything about that at this point. Just keep moving forward.
Interesting shot with clecos holding the rubber baffle material in place.
A look from inside cowling at the rubber overlapping the joint.