The overhead fresh air duct (overhead plenum) came with a "v" cut in its aft end to accomodate a mounting bolt for a Lycoming engine. Since I will be installing Continental engine I don't need that v. I cut the v out and made the end square. In addition, I created a low spot to be used as a water collection sump and glassed a hard point below it with 1/4 inch pipe thread. This will be the water drain.
