[BMack]

I'd go with a wine cooler if I had the money... but this is a good idea if you already had the stuff lying around, imo. For the seal on the tubes, you could rig split rubber hose into a grommet and epoxy it to the cooler then use silicone to seal the tube to the grommets(so it's removable).

I'd imagine you'd need fans to circulate the air or you might get cold spots, also you'd need to isolate the tubes to keep them from dripping condensation on your cigars. A simple metal grate or a wood divider should work.