Hi, I have just bought my first MIG (see pics), saw it on ebay and couldn't resist putting in a cheeky bit. So it's cheep and rusty but everything seems to work apart from the wire feed. The motor seems fine with plenty of grunt but the wire is sticking in the liner and or torch. I dismantled the torch and found the rusty and broken spring liner. I need new liners I think but I have a couple of questions: Is it a Clarke torch? Why is it thumb operated? What bits do I need? Also need tips and a nozzle me thinks. Any advice please.