I think if you’re interested in heavier duty constructors such as this, the real move upwards is to unistrut…

I built a walk in closet clothing hanger system out of these, has held up well and was easy to assemble once I polished and cut the tubes.

Looks like fewer places for clothing to snag as well.

I think it’s early days for Maker Pipe so I’m not going to dunk on them too hard for this, but I noticed the lack of angles means you can’t build for instance a 3:2 rectangle with cross braces to prevent racking. You have to do squares only. Kee seems to have solved that problem.

Is this not angles?

https://makerpipe.com/collections/modular-pipe-fittings/prod...

That’ll do triangles but not crossbracing. X’s not λ‘s

Use 2 of the 'Adjustable Angle Hinge' to make a single diagonal across the rectangle.

At the midsection of the diagonal, install an 'Adjustable 180 degree' along with two more of the adjustable angles in each corner.

Would that approximate it? Sorry I'm not better at ascii art.

https://makerpipe.com/collections/modular-pipe-fittings/prod...

I am just wrong due to incomplete info. The page I originally clicked on only had about half of the full catalog on it, and the way it was constructed I presumed it to be exhaustive.

There’s a 180° adjustable fitting that does exactly what I described, as a sibling to the link you provided.