Re: type of element
Baz, this may sound odd, but those furnace elements air cooled, that is, they are designed to heat an air stream flowing over them. If you take away that cooling flow of air, they may not last long. I once built a metal melting furnace using electric dryer elements as the heat source, and those elements would burn out if used full on (power on 100% of the time). The heat was reflected back from the insulating refractory and caused the elements to overheat and burn in two. Your PC oven is not as severe as that metal melting furnace, but I think you'll be happier using a radiant element such as those found in kitchen ovens.
Now, if you want to go to the trouble of obtaining some Kanthal wire and winding your own coil type elements, that method will work. Kanthal is the element wire used in ceramic kilns and is good for 2300deg or so without burnout.
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