For use of the spool gun RTFM. aluminum requires use of argon as the shielding gas. The spool gun is in the black case on top of the grinder bench shelf (manual is inside case), it is set up to work once you RTFM. <br /> | For use of the spool gun RTFM. aluminum requires use of argon as the shielding gas. The spool gun is in the black case on top of the grinder bench shelf (manual is inside case), it is set up to work once you RTFM. <br /> |