I've been stick welding at college for a couple of weeks and have done some nice welds on laps, t's and vertical down welds. But I can't master the open root bevel flat position. The material is either carbon or mild steel, from 5 to 10mm thick, i use a 2.5mm gap and raise the work off the bench slightly. I have a root face of about 1.5mm and use a 2.5mm electrode (6013 i think) the amps are about 80. I get penetration and the slag underneath the weld just drops off nicely but its a bit wavey and sags in some places and not in others. The top of the weld sits nicely in the grove but there's lots of slag inclusions and thats if i can even get the slag off, it seems to resist a fair bit. The technique i use is to move the electrode straight down the work slowly my arm parallel and then whip it back to prevent keyholing every 2 secs. I've tried this technique but no joy. Can anyone suggest technique or point me to a video, cheers.