Well. at least I'm glad I read this before drilling any holes in my freezer, which also has coils on the shelves. I thought about putting hard plastic sheets under each shelf, but realized that would only compartmentalize the cave and restrict moisture and even temperatures.
I have sent back two hygrometer/thermometers because they did not test out well. But I have just ordered a Sunpentown ultrasonic humidifier from--of all places--Sausagemaker.com. They say they have tested it out for making fermented sausages (which I am NOT ready to attempt) so it should work well for a cheese cave.
Now I've got more invested in the controls, etc., than in the freezer itself, but it's going to mean a delay until I can find a suitable and suitably priced freezer to use.
Sorry about your bust, Carter. I was going to go for Emmenthal this weekend, but I think I'll try something I can wax.