Interesting suggestion Jim, Thanks. I suppose i could have some closed cell foam coring shaped around the aluminum that is there and epoxy it.
Would be interested to see design drawings and cross sections for glass fins to perhaps loft from as a template.
Just what I need... another project!
Sorry to hijack the thread.
I've got a pair of 6 1/2 sq. ft. fins ready to go to a new home. I'll be replacing with 3's. They're in perfect shape.