Mig splatter....

So the metal liner was the culprit? I got a dinosaur "Dual Mig-131" But its made in Italy. Feed roller tension is shot so Im using a lever and spring. I have yet to try gas, but the HF wire and even Homie Depot (Miller?) wire seems to work ok (lots of spatter) but Im no welder so OK to me might be dismal to a welder. Lots of burn through on exhaust pipe, but its usually super thin used header pipes.