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<p>[QUOTE=&quot;GDJMSP, post: 1793619, member: 112&quot;]Rich - </p><p>&nbsp;</p><p>If I understand correctly it sounds like you are saying that you think that if the sealing process were changed that the acrylic slabs used by the TPGs could be made airtight. Am I understanding you correctly ?</p><p>&nbsp;</p><p>I hope not, because the acrylic plastic itself used in the slabs is air permeable and for that reason alone they could never be made airtight, no matter what they did to the seal between the two halves of the slab.[/QUOTE]</p><p><br /></p>

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