Here's some pictures of the completed deck prep which included 
all the wet balsa removed and sanding of the skins and remaining balsa.
Also all the replacement balsa was precut from templates 
made on the boat. It was more labor intestive but because of the 
odd patterns  it was easier to cut them this way without damaging them.
I had odd shapes because if the orginal core was in good shape,
and not delaminated, I left it, so as to not risk damaging the
bottom laminate.