Awhile back a local musician asked me to make up a fiberglass flight case for his guitar.  For many years Calton Cases out of Calgary had been the "go-to" case for travelling musicians.  Sadly, with new ownership, quality and customer service tanked.  So with this in mind, the request came in.  You can see the Calton case at the bottom of this post.

I decided to simplify the shape for a variety of reasons, partly construction, but also providing more interior space within the same overall size.  I also decided to make it glass over foam, in this case 1/2" Pink insulation foam.  The inside will be glassed as well making it a foam core structure.  The foam is glued together with regular woodworking glue.  While not a very strong joint, it is strong enough to hold it while sanding and glassing.  The foam is kerfed where it needs to bend around the corners.  Simple packing tape is enough for clamping.