Seeker good point did not think of that since I measure everything out from batch to batch.

Catman thanks for the tip even an old guy can learn, that is part of the pain and fun of building a boat. Yep epoxy adds more work, sometimes I think I’m sanding concrete, but with a thin carbon skin on foam I think it is best bet. I have not had too much problem with stick but the epoxy has time to cure for several days to a week or more before I sand.