sometimes a different sized roller is needed, on most all brands today that shouldn't be required, i would recommend getting a teflon liner to help with the aluminum wire, it's such a soft wire it needs as little resistance as possible, otherwise it can "birdnest", that's when it sticks to the tip and gets wrapped around the rollers quite well , forming a birdsnest resembling clog of wire,
Zip, i think he was probably brazing that aluminum, there is a rod called Alumaloy
http://www.alumaloy.net/ That is a low temp brazing type rod
