Here is the start of my fuse building, vacuum bagging the fuse in two halves and will add joiners and bulkheads to finish the fuse.
The fuse is a composite layup with fiberglass 90 gram crossweave internal layer then a filler layer material (I forget the name of it) which acts like a filler to provide stiffness while not adding too much weight. It's sort of like having a layer of honeycomb. Then an outer layer of 100 gram straight weave carbon fibre. This is all held together with a marine 5+1 epoxy resin that takes about 6-9 hours to go off.
I have gone out on a limb and tried to pull a vacuum down onto a raw wooden plug that I have covered with a layer of cling film and then a layer of peel ply. Hopefully this will be removable in one piece without total destruction.
The other thing I am trying for the first time is using standard (cheap) acrylic sealant as a bag sealant. This has worked extremely easily, so far, and was a excellent way of sealing the plastic bag to the board. Hopefully it will clean off the board easily once the time is up and I remove the part from the mold.