bob andrews: Simple & (hopefully) Effective
This is by far the Easiest way to do a transom, Giving your's has neither "Organic" /Wood stringers or saturated foam.
Materials in this case will run around $600.00. Ply wood would have been cheaper, but a product like this is typically lighter,
it floats, & at it's worst will absorb no more that 2% water by weight.
A new "wider" full Transom Cap, inner and outer skin will laid up with 1700 Biaxial & Epoxy