here is a link to an ongoing discussion about improving performance of the less expensive welders http://weldingweb.com/showthread.ph...c-170-Amp-MIG-Flux-Wire-Welder-Mods-and-Tests, these guys have of knowledge i have tried adding capacitors my self and it really helps a lot in the states these cheap welders can be bought for less than 100.00 dont know how that would equate to the pound , maybe this could help you , my take on the cheap welders is arc not very stable and wire speed not very repeatable or steady, i have had migs for 30 years used to work at welding supply co 1 of my jobs was to set up and teach use of i sincerely hope this is of some help steve