Didn't ever lose a gasket through slip-out. Just always had a weep/leak where the valve cover, intake, and head came together. The head and intake top surfaces didn't ever align perfectly, and the valve cover gasket didn't like that "step" between the two. The silicone blue glue seems to span that like the old red Form-a-Gasket didn't.

But I like the roll pins! Great improvement for that big span. I'll keep that trick in mind.