I think were are nearing the time when the Chinese stop ****ing over buyers with crap and start offering a much better quality welder:

LONGEVITY MIGWELD 250 MP - PULSE ON PULSE MIG

http://youtu.be/8uOqiFu6Lgw

Comment I left on this video:

"Thanks for the response. What I'm looking to see is how this Pulse On Pulse welding performs on thin sheet metal and if you can get a speed increase over non pulsed MIG."

Transformer machines are on the way out. Not enough control compared to an inverter.