I guess you could scavage an old oven for the controller too. Nice thing is you can go with 120 volt or 240 depending on which one you buy? I was thinking one of the 1000watt or two of the 660 watt 120volt cone heaters and I can just plug into any wall outlet? Do you think that would be enough for a small 24 inch by by 30 inch high oven? I know it may take a little longer to heat up but I’m not doing this everyday.