home made oven question

[Cobblepot]

Still an oven made out off wood, gives me chills. Eventually the wood will be too dry and it will catch fire.
Why not try these "stones" ? Don't know what to call them in english.
http://members.lycos.nl/debouwval/hpbimg/Im000412.jpg

[El Diablo]

I built a temporary drywall oven to bake my blob sculpt, simply because I couldn't find one big enough to get him in. It worked very well