Hey all I'm using a Clarke 151en with .8 mild steel wire and Co2. I've been practicing on some pieces of scrap which is around 2mm thick (2.35 according to my calipers) Ive experimented with different power settings through from 1min through to 3min and wire speeds from 3 to 6 but despite what I do and how slowly I move I'm not getting any consistent penetration. I'm getting quite neat lines but all the weld is on top and nowt underneath except in the occasional blob. I've watched the tutorial vids and they don't seem to be moving the torch as slowly as I'm having to in order to get it to penetrate. Any ideas?? I am having huge fun with this anyway but would like to start getting some good welds. Thanks for any help or suggestions.