That's exactly my set up Alden. A vertical panel saw really helps in a one person shop.
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This would be great in a large shop that has room to steer the cart
http://www.workbenchmagazine.com/mai...0-caddy01.html
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For me it's more efficient to slide panels vertically from the storage rack right on to the vertical panel saw, all at the same height. No lifting, just sliding. No sliding or flipping full sheets on their faces. That can scratch them.