I am not certified but i consider myself a better that sucky welder. My problem is i cant seem to get a decent weld when i weld upside down. The puddle just wants to drip like snot and crap up my gun. I know there is a trick and i'm sure everone is different so please give me some good info on techniques to try so i can find out what works for me. Most of the material i weld is .120 wall and round. Thanks!