[TexasSP]

Just a quick note but 6061 is better to weld than 7075, while 7075 is stronger and much more machinable. There are some other alloys that are stronger than 6061 that you can weld as well although I am foggy on the alloy number right now.

I will also note that aluminum is one of the trickiest metals to weld due to it's low melt point. Of all the welders I have known and have worked for me, I only know of two that can do a decent job. One guy is good and the other is awesome.