I'm working on a "gauge cluster" (compass and depth gauge) for my Cat 22. (I've only drilled the holes and shaped the edges, I haven't sanded or varnished this yet.) I'm curious what you think the best way to mount this piece would be. It is going on the bulkhead between the cockpit and cabin, so that means that the fiberglass bulkhead has to be drilled for the gauges as well. So there will be two layers of material next to each other that are drilled.
I was considering at least two options. One would be nicely placed carriage bolts that would have the nut on the inside of the boat. The other was to try to screw from the inside of the boat, so that you would not see any mounting hardware. Another idea is that with the depth gauge, since it mounts via compression from the rear, that possibly I don't need any hardware to hold this gauge cluster in place.
I'm just looking for some input
Also, how would you seal around the gauges? 4200?
As always, thank you kindly
P.S. If anyone is interested in the piece, I got a 12" long by 7" wide piece of teak from buck woodcraft, I measured everything out, used rules and compasses etc, then used a hole saw to cut the holes, and then sanded the edges smooth to get rid of sharp corners. It took all of 30 minutes.