Building 1 time use mold. input?

[Dave Hirshberg]

John an JW,
You must have been posting the same time as I was.

I hear what your saying and i'm planning on using a coring material in three places on the outer skin of the mold. Leaving two 3 inch gaps between the sections that will form the corners. The coring will be running vertical to the top and bottom of tank. I'm hoping this will stiffen the three sides and prevent buckling while allowing me to bend the still green fiberglass around the D shaped base and D Shaped top (3/4 Ply) and form the two radius curves in the front before it completely kicks. I then plan to add core board to the radius to keep it from trying to lay flat after the base board is removed. This is just going to be a flimsy single use mold to lay up the actual fiberglass part . As I lay up the part itself I may use some coring material as well to stiffen and insulate. We pretty much bottom fish here with Shrimp, Pinfish, and grunts. All pretty hardy baits. I find that good water flow is the most crucial, they don't tend to bunch into corners. however, I plan on forming a clay radius on all corners of the mold before laying up the actual part.
Keep the input coming, I appreciate it.