So after doing some research in built my first forge, just as a hobby and start beating some steel. It's made from soft fire brick. And a Venturi adjustable burner. I fired it up for the first time today and with in minutes multiple bricks cracked, is that normal. I bought since for brick mortar that I planned to glue it all together once I saw that it worked and the size was sufficient. My only other concern is the shaft of the burner got pretty hot near the bottom and very warm about 100 degrees near the top, is that normal? Thanks for any help and advice, can't wait to learn from all the knowledgeable people here. Unfortunately I'm having a problem uploading photos