I watched a you tube video put out by miller and in it they were welding 7018 and running a grinder at the same time with the machine at idle. The miller rep stated the 325 had Auto-Speed technology, but said nothing about it having the Excel power option. Can this machine be run at idle performing these functions without the excel power option? Also I will need 200' of cable for my welding circuit. what size cable will I need?