There's a knack to it
Turning your gas up is a start, your going to have a too long of an ark...(too much wire sticking out)
Soo turn your wire speed up and the amps down slighty on both cases
It will do the sput sput sput thing for a second or 2...Stay put till the ark evens out and sounds right...then just stay at the leading edge of the puddle...If it starts to spit sput sputting again your traveling too fast slow down...You might be surprised at how well the welds look...
Years at lockheed and loram taught me this...Plus being a smaller guy I always got stuck into something nobody else could or would fit