OK, today I remade the rod shelf. First, I clamped it to the base and transferred the centerpoints with a square.
Drilled the slots on the upper shelf, and set it back on the base to check for errors.
It all looks good. I had to eyeball it a little, even with the square. But they all matched up within 1/8", so that's fine.
After I was satisfied that almost all the cutting was done ((2 side pieces need to be fitted into place at the end, I gave all the pieces a thorough sanding. The boards were quite smooth, but as I learned from a previous project, there is a slight film that makes for uneven staining. I went to a 150 grit. With the random orbital sander, that does a nice job for a garage rack. If it was for in-the-house furniture, I would go to 240 and maybe even 320. But there is a limit to how smooth you can sand softwood anyway.
Tomorrow, I'll dry-fit the pieces together, drill pilot screw holes, and tape the areas to be left unstained for glueup. Then, stain the pieces. Next day, I'll give it 1 coat of polyurathene. After that, it's "glue, screw, and done"!