I posted this question in the DIY section, with photos, under "DIY Incubator using Wine Cooler - Flexwatt Placement?"

The bottom of the wine cooler I'm using is not flat. It steps up about half way in.

Would it be better to run the flexwatt starting at the bottom and up the step to the back or just on the back alone? The photos show a metal plate in the back for cooling that will be removed. I'm thinking of using 11 inch flexwatt but I could also 2 strips of 3 or 4 inch if that gives better results.

I need help from people with experience. Thanks.