I have that same model, and I made a few changes. First take out the tray and metal screen. I put all of my eggs (4) in a rubermaid tub, 6 Qt. I believe. I had plain small vermiculite in the bottom of that. You want the vermiculite wet, but not so wet that when you squeeze it, water will come out. After the eggs and vermiculite are in it, put some press and seal over the top. This will not fill the entire bator. I also put a small bowl of water in it, as well as a bit of wet spaghnum moss around the bowl. I put my digital thermometer/hygrometer outside of the 6 Qt. tub, and took the wire lead for the "outside temp" and placed it into the tub with the eggs. I also took the lead for my thermostat, and placed it in the egg tub.

The way I handled the temp issue is to start early. Way before the eggs get there. First, I adjusted the built in thermostat. it is not a good one on the Hovabator, so it is good to have an external backup. once I was anle to get that stable, I plugged it into my external thermostat, and adjusted it so that it would go off just before the Hovabator was set to go off. I have heard that if some thermostats fail, they will continue to heat. Having two will help a lot.

I do not have any pics right now as I already took my setup down. I hope this helps.