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I am finally getting started on my new forge and wanted to share with you my progress on the burners. This forge will employ None Aspirated Ribbon Burner (NARB) burners, (2). I based the design on Frosty's burner but change the dimensions from the 2X2X7 to 4X4X2.5. I am using the same number of ports (17), but reduced the size from crayons (3/8") to 1/4" as I will use machine threaded bolts in place of the crayons.. Today I ran a test of the burner using a wood insert to take the place of refractory. It fired off nicely, sounds good, and the flame looks ok but I have not turned the MIG tip in the burner yet, I will do that once it is installed into a forge. I ran the pressure from 3lb to 6lb, the flame did not vary, after about 45 seconds I shut it down. The pipe casing you see in the pictures is not the forge body as I do not have the little part yet. Tomorrow I will do a test of the burner refractory with a couple of my machine bolts installed. One with release agent, one without. If anyone has comments or concerns I would like to hear them.