The smallest mig we use on alluminium is 200amp unimig we have tried the small machines for fine work but they are hopeless, it appears .9to 1mm wire is ideal and i use a short lead with a nilon liner and a felt cleaner on the wire just behind the drive rollers.It is also good practice to only apply the minimum pressure to the drive rollers to avoid wire bunch up should your tips become blocked good luck with your with your choice of welders greg b |