Wow, excellent work! Amazing, that's exactly what I'm thinking of doing!

I'm not american so I'm unfamiliar with flexwatts, could you post a pic showing the heating system a little better?

Did you have to modify the cooler itself (drill holes etc) or can you still use the cooler, as a wine cooler when not incubating? Or what I'm planning, as a winter cooling "hotel" for corns for winters.