Normal mig with c10 gas is giving me the best welded.
I got 100'+ of bead to lay on 1/4" steel this week and I will try all the setting the 255 has.
Over the weekend I welded over 20' of bead, on 1/2" x 1/2" x 14ga tube.
60 pieces for 6 small gates, in 1 1/2 hours.
Have 27 more of the gates to build in the next week.
Used the normal mig c10 setting and the welds went down fast and clean. I did set the autoset for 16ga, not 14ga.
At 14ga setting, if the gap at the joint was over 1/16", it would sometimes blowout.
Got around 10000" of cut to do with the cnc plasma cutter today, then back to welding.