been welding steel for ages but fancy a dabble with aly ,was thinking of .8mm wire , but people say 1mm for less jamming was thinking of 5356 wire have got pure argon do i need a new liner for aly ,,anyone know what internal diameter of .5kg reel s are ,,and 2kg reels ,,want to make sure these fit as well ,,want to weld aly up to say 4mm ish thick ,, suggestions anyone