09-01-2013, 11:29 PM
Yeah. My Miller has an exposed (std) nozzle and tip and I have to use the plastic insert in my torch guide. In the same token, Miller says not to use a metal guide bar / straight edge for making straight cuts because of the possibility of arcing out of the side the tip. I think it's ok to do when using a drag tip and nozzle though. It's been awhile since I looked through the manual.
Willie