Thanks for the response! Yes there is a slight gap when I do butt joints. But as for the tube fit ups, is there anyway to determine if I have good penetration? On steel I can easily tell if I have good penetration, but I don't see any signs for aluminum.

Hey everyone, I'm new to the forum, but I've been a long watcher and reader of welding tips and tricks videos/posts. After looking at all of the videos about aluminum Tig, I'm still having trouble getting full penetration on any tube fit ups more than .065 in thick. The beads look good and are consi...