Steve, now I see what you were talking about with the cowl, and that certainly creates a problem with the left bank exhaust. Right exhaust could stay connected all of the time, but maybe the left could be attached to the fuse side (and OX engine) with small screws (and dowels), removable when motor maintenance needed? Just a thought.

Great job on the louvers. I can see where they will look authentic when mounted. I didn't go to any trouble on mine, just cut louver-shaped openings in the fuse sides for cooling. Also glad you kept your fingers .

Lee