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> > I wondered about the air flow thorugh MDF but the idea came from a post I saw a couple years back that I now can't find. The guy was using 1/2" material to build the vacuum chamber and had to paint the non table areas to hold his vacuum. Now he may have been using particle board and calling it MDF, particle board is much less dense.I'll bet it was leaking around the joints, and the paint filled it in.
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