I think .028 is light for racks, and I actually thought that was what P. said in his rack tape. In that tape he makes a very light rack, but mentions that is what it is. At least as far as I can remember.

I personally thought that rack making was pretty easy. I came to it with lots of workshop and design experience, but minimal metal working experience. With the bends, I just marked the point where it was clamped in the bender, then I did a bend, measure the bend position, and just copiy that for other similar bends. So if the offset from the mark is 2.125", That just becomes a design module I can insert in any build that uses a similar bend.

I made a bender for motorcycle sized tubing, and adapted dies to a smaller rod bender to get something that would work on smaller tubing. Many of the big box stores have these small benders for decorative iron work. The first dies were just those pot metal pulleys for motors, with epoxy contouring. These lasted a few racks then broke. The dies I currently have are metal bits I found in a store. All they needed was to have grooves cut in them on a lathe. The bits are heavy sprocket hubs from a hydraulics supplier.

I don't have much luck welding the small tubes, but brazing them was pretty much a piece of cake with silver.