Jim ha scritto:

I watched a guy with a similar Swan to the original poster's buy "the
next length" screws to replace all his deck screws. I think this was a
mistake.

I think it too. The main problem is the head of the screw coming out as
the plug is thinned by sanding. On the other hand deepening the
countersink will eventually go all the way through. The best is, I
believe, avoiding screw altogether and gluing effectively.

Regards
Daniel