Hi Joe -
I read with great interest about using Cryogel Z for your insulation. I was just about to move forward with rigid board R5 I think but realized (with the guy doing the work) that the volume of my freezer would be too limited...searching for alternatives led me to the forum and to your post.
I would love to talk to you about your experience and I think the XL tool you talk about would also be insanely helpful.
Are you open to having a call with me? I'm from Seattle - my boat is White Wing (Barnett 47 built in NZ)

Best - Joe

joe.williams at live.com and my cell is 206-890-8869.