Hi guys, I wonder of someone can help me with a few enquiries. BACKGROUND: My employers are considering manufacturing rollers from aluminium. these are 12" pipe with 1/2" wall thickness and a 1/2" side plate to be welded inside each side of the pipe (fillet). I'm the one they're looking to as I've welded it in the past with a spool gun and TIG, both for a different employer. My questions would be as follows: Should we fabricate with MIG or TIG? What are the pros and cons of these in regards to aluminium? Which gas to use? Any other point? Many thanks in advance guys for any replies.