casting bronze pour

Designs for a wax burnout kiln

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I am wondering if anyone has plans or suggestions for a wax burnout kiln? Currently we are using a kiln which is constructed out of an oil drum, which work well, but it is loaded from the top making it difficult to get the molds in and out of the kiln. Majority or the bronze sculpture object which we are casting are within 6"-2.5' in height, so I was thinking of a front loading design might be a good approach.