Finished the tubing rack. Each arm holds my 200Lbs. There is another one out of frame so thats 1000 Lbs.

The garage is about 23' wide inside so a full length will fit up there.
Had a few minutes

at work to fab up some parts for this weekend. Here are the plates that will attach my sliders to the frame. They are 3/8" thick 4.5" wide and run the full 5" height and 2" width of the frame. I sheared the material from 3/8"x6" flat bar, put a radius on the corners and smoothed the edges on a belt sander. I used a 3" bottom Vee die and about 15 tons of the 60 ton press. I tried the 2" and 2-1/2" dies but the material just cracked (not big enough radius).
Also cut out the pie shape to taper the arms that come off the frame - I used the big band saw at work.