Modifying electric kiln for sword HT in Tools and Tool Making Posted June 29, 2012 I'd be inclined to build from scratch, rather than substantially modify an existing unit, unless it is very clear from the outset that modifying will be cheaper and/or easier. I've built 5 electric HT ovens from scratch, 4 of them for work up to 18" long and one for work up to 42" long. All will work vertically or horizontally. I think the long one would probably work best at about 45 degrees; vertically, it's a long way to have to lift out a full-length workpiece. For your questions: First: Maybe, but it's fun. Second: You can buy elements from many places. As a general rule, the fewer constraints you give the supplier, the cheaper they are. Simple coiled 16 ga Kanthal A1 works well. I get mine from an ebay supplier in Portland, Oregon (I'm in England). No complaints. Third: What type of firebricks? You want the soft Insulating Fire Bricks. 2300 degF grade are ideal, as they are cheapest, softest (for shaping) and least dense. They have the lowest heat capacity and are the best insulators. If you have hard bricks, look for the soft ones. On my first couple of ovens, I filed the element grooves with a length of allthread. From number 3, I wised up and used a router to cut the grooves. Fourth: If you use the controller output to drive a contactor (basically, a big relay) and switch the 220V through the contactor, it should work OK. You'll need advice from someone familiar with US wiring codes though. Fifth: It's better to ask someone who knows you well I've built HT ovens that work and haven't killed or maimed anyone, which suggests it's not difficult. Sixth: If it's at all useful or sellable, I'd try to keep the kiln as it is for as long as possible. Some of my efforts: 18" oven with facility for vertical use with salt pot. 42" oven. usable horizontally or vertically.