So, if i read this correctly, once the cut-out/fastener area is potted, then the light goes back in with mastic on the outboard flange only?
If a leak develops I will see the trace on the inside and all that will likely be required is to pull and re-bed.
Gee, good thing I only have 9 to do.
Oh, and the handrails, and 2 hatches and the companion way cover and the genoa tracks, stanchions, maybe the pushpit, pullpit and about 40 or so other things.
Gonna be a very long summer.