Brand be to knife making, but real eager to do well. I'm having issues with my forge. Recently given a forge by a guy getting out of the business, it's made from a compressed gas cylinder and kaowool lining. The original burner was corroded and blocked so made a new one. I can post pics later today. My issue is, yesterday was my first successful burn and I'm getting smoke and lots of heat traveling back up the tube toward the nozzle. How much is too much? Like i said I'll post pics this afternoon to help determination.