[40-A Twins]

The window frame on my 28 is bare metal and has a deep scribe line on snap hole centerline. Using a caliper held at an angle sufficient to catch the edge, the scribe line is about .290. Why was this windshield frame scribed and hand drilled ? One can only guess that the guy using a drill press with drill jig could not drill enough to keep up with the rate, or maybe the drill jig was in the maintenance shop; who knows. The holes are not all perfectly centered on the scribe line, and some are not very round either.