I have been using a Lincoln 175 mig welder for aluminum for years. works great as long as you dont bend the lead in a tight curve even the soft wire works good, Also I bought a extra welder lead so i have 2 one i use for aluminum and one for steel so I don't have to change liners for fast change over as for the small little guides for wire were the rollers are i just leave the plastic ones in machine just blow them out with my blow gun to get any steel out of them and just switch rollers . I run both tanks on my cart with a 3 way valve to switch from co2 and argon .