I test my welds with a big hammer!
It was 90˚s beforehand.
, on Flickr
It's not pretty but the 2mm box started to bend before the welds even thought about breaking. Need to see if I can fold into two but I'm a lot more confident thanks to this thread and some further reading. Big BOC Argoshield bottle and £40 reg helped, just need to refine my technique a bit to be more economical but happy all the same.
Tried to switch to 0.8mm wire but the wire just kept exploding on contact with the work piece so I panicked and put some more 0.6 in could be down to the feeder but not sure.