I like this jig idea. Will try on my next build.
I don't know what sign foam is. You could use a small piece of plywood and wax it with paste wax but it might interfere with some finishes. Another material would be UHMW polyethlyene. (UHMW = ultra high moleculsr weight) you can buy it from many sources.
Yes, there's that. Being my first build and not knowing where everythings going to go, I'll not reinforce corners this time around just to see how it goes together. I also don't want to create issues down the line.
Sign foam is a high density foam used on CNC machines for machining 3D signs. Comes in large 4 x 8 foot sheets of various density and thicknesses.
You can make them any size, length, width and depth if need be. They don't have to be as big as the one I made. I may make a few - a selection....just an idea because everything I've read said the bulkheads MUST be square to the keel.
I'd be leary of using a foam - especially if is open cell. Glue could migrate into it. What are your thoughts?
Most plastic kitchen cutting boards are UHMW. So you can get a slab of it for a dollar or two at your local Dollar Store. Now, Dollar Store goods should be food grade, and therefore non-absorving, but you can test glue adhesion / absorption first before using it.
Or just run your glue to near the top and add glue after the majority of the bulkhead has set. No chance of contact with the jig.
