Just remember that when the volts and wire speed are set properly it should sound like you are frying eggs. I typically try to heat the thicker metal 1st so I don't blow out the thinner metal. A mig with gas will usually produce pretty welds while a flux core weld will sometimes look like crap. You can look at my sliders if you need an example of crappy looking welds. Lol. Let us know how it goes.