I recently built a cabinet style incubator out of 3/4 plywood. I'm using this https://m.ebay.com/itm/Inkbird-Dual-Stage-Digital-Temperature-Controller-Fahrenheit-Thermostat-with/292384766063?epid=1143426092&hash=item44137d786f:g:vAwAAOSwQcJaQlAA electronic thermostat to control two 200 watt...