Table for my mill

[Vinny]

I'm sitting here looking at the bench I have my mill, mini-lathe and toolbox on. The two heaviest items are at the extreme sides (mill and toolbox) and the middle is getting a real bad bow. More towards the mill from center. I've already glued and screwed another 2x4 behind the front but the bow continues to get worse. Slowed down since the extra 2x4 was added but still happening. I could add another leg and may for a temp solution but I've come to the decision that that bench has got to go.

That brings me to my question. I need to make a table for the mill. I don't know the exact weight but I guestimate it's between 350 and 500 lbs based on the colors our faces were turning trying to get it into the back of my Durango. I was thinking of using 2" square tubing for the legs and 2" angle for the top frame and intermediate frames for shelving below for tooling, etc.

Will 2x2x1/8" angle be too light for this or do I need to go heavier?

Thanks!!