J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Drying Balsa Core with Vacuum and Heat

Dave,

Have you considered putting a terrycloth towel under the plastic sheet to help distribute the area you draw the vacuum? It may not make a difference since you have the kerfs and the vacuum will follow those lines.

ps - you can make your Youtube video display by clicking on this icon in the menu bar .
I edited your post to do that.