Right, as some of you may know I have just purchased an ac/dc Parweld XTT202P and will assume at some point I’ll be welding mild steel 2-3mm thick, stainless 1-3mm and Ally 1-3mm thick. I have 1.6 and 2.4 grey tungstens which I’ve been told will do all the materials I’ll need. Can someone give me an idea which rod I will need including sizes to carry out the above? I’ll be looking at small packs of filler rods from eBay at about a fiver for 20 (ish). What should I be looking for? Haven’t a clue when it comes to numbers 316/309/4034 or whatever?