Hello, I have this welder, Draper mig weld 900, and I don't know what type of wire spool it can use, I think 0.450 kg and 0.9 mm is fine, but I would like to know if it can use a larger spool and another as thread, 0.8 mm for example, I have also seen in this forum that it is appropriate to change the nozzle or tip of the soldering iron, can you tell me what type this soldering iron uses, I have looked for the manual on the internet but I have not been able to find it, I have not soldered Never, I'm a total beginner, thank you very much for your help and sorry for my English, which I know is quite bad