I am replacing the core and bottom skin from an area about 10 x 12 under the starboard line clutches on a J/120. I read that it's best to replace the core with the current material (balsa) rather than an alternate (foam, pvc, epoxy sheet)? True, or do you recommend another product?

I'm looking for the easiest/best way. I first planned to build down the area with resin/glass, layered into place using a 2x2 support and blocking/wedge. But replacing with the core material seems easier if it will be as strong for the clutches (stress will be mostly in shear.) I will probably reinforce it with a s/s or alum backing plate for the clutches (there should be room above the liner for that.)

I use both West and Maas but prefer Maas due to the 2:1 and no blush -- concur?