As much as I'd have liked to get a 50 amp Everlast plasma to go with my Everlast MIG and TIG, I ended up getting a 50 amp Chinese unit, I'm retired and can't justify the difference in price. In the manual it suggests 0.6 to 1.1mm nozzle orifices but I've only found one source with one other size besides 1.1mm and it was 0.7mm, I couldn't even find a size on most nozzles including Everlast's AG60 nozzles, can the orifice be drilled to the diameter required or am I missing some feature on the inside that means I can't do that?