I had my motor built by a local machine shop last May and I developed an oil leak 2-3 months later. I got up under there and checked it out and at first I thought it could be the rear main. Well after pulling back the inspection sheild a little, it's definitely not the rear main. My question is, does the Windage tray require a silicone bead? I'm wondering if the shop didn't do that. It seems to me now that the only place it could be coming from is the pan.