Boat Mold Question

[ahender]

Hi:

I am at the point of adding a spine to my 12' female canoe mold.

Just a few questions.

Should the spine be made primarily of reinforcement and resin or would some reinforcement and lots of resin w/filler work best?

If yes on the filler, what filler works best for this application (fumed silica, micro balloons, milled fiberglass, other)?

How many bolt connection points should I have on a 12' mold?

Should the bolt connection points include some sort of block material embeded in a resin/filler mixture?

Thanks...alan