i bought a roll of dual sheild to mess around with and dont recall using a alot of gas flow. certainly not even close to 50cfh. probly like 20 or so....
if the bead is humped and toes not wetting you can be sure its a bit cold. rather than autoset you can look at the chart in the door. if the material...
Those aren't worm tracks. Worm tracks can be fixed by lowering the voltage, but that's not the situation here. This looks like lack of gas coverage....
The dual shields are normally designed to drag the bead but run ok if you don't when in position but vertical up will be more straight in or a slight...