Let me solve the oven prob for everyone. I built mine about 10 years ago at a cost about 20 bucks. think FUEL OIL TANKS. the 275 gallon type,cut one end out take to car wash and degrease. then make a square frame out of angle, make square door to fit frame.Door need not swing or stay on oven. use barndoor track for moving parts in and out/trolly type system.I welded two tanks end to end wrapped tanks with insolation and use ceramic electric heaters with thermostat.... William "ONES FUN TWO'S A RACE"