Hey guys..I've been a mechanic by trade....so familiar with sticks .torches,and migs.I was looking to revisit Al welding...did my research..I settled on the 256 combo because of the plasma option...and i love green.. Last tig machine I ran had none of these pluse options{tan.hobart) and I never really figured it out.. ..so I still have a learning curve..U tube has been very helpful.Just burning rod for now.