I’m not making the CLC tongue box but in area that needed to be held in place while the expoxy set up I used outdoor “deck” screws (from Home Depot). Some examples the finishing head screw clamped the galley flat stiffeners in place and were driven home and to use the manual’s term “entombed” them when I coated the surface with epoxy. Where the Galley gutter meets the transom I couldn’t get an even glue joint and used the washer head screws as temporaty clamps. Back them out and filled the holes with wood putty.
Even though the screws are self drilling I drilled pilot holes to avoid splitting the wood. I also did the fine tightening with a screwdriver to again avoid damaging the wood.
