I built a stand for our new bead roller last week with 4x4 and 2x2 tubing, both 1/8" wall. I angle cut the end of the legs so they're not as easy to trip over.
Still need to get some plate to weld over the angle cuts and have it powdercoated.
I also built my work/paint mixing table and stand for the shrinker/stretcher using 4" and 2" tubing. I don't have a finished pic of the table, but it has a 1/2" plate steel top with a 16g stainless cover that wraps down the edges about 2-3" and adjustable legs welded to the bottom. Both of these have been powdercoated semigloss black.