I purchased a mig welder less than two weeks ago and when it went wrong I took it back. The guy told me it was a common fault and I should have been told. Anyway, he said he can up grade it to a more expensive model but for a refund it would have to go to be tested (even though you can clearly see the the problem). I will have to wait 28 days as that is their rights to see that it is faulty, then I will have to travel back to the store for a third time (still with no welder) to get a refund. If I knew they were the only company with such a long winded and frustrating right to do this I would have gone to screwfix or another supplier. """""""Stay away from Machine mart""""""