hi have just got given a sip turbo 130 gas mig that wouldnt feed properly i mucked a bout with it all day sat and got it working fine hope not to bore you lot senseless with silly questions
Welcome to the forum, if it is one of the older sip's there is a simple brace modification you can do to the feed rollers which apparently makes a big improvement.
Have a search of the sip section and it should appear