Nice work! I also built an 80/20 rack for my '08 4Runner. I was lucky enough to get a bunch of 1515 profile extrusions for a song, so I made it out of those.
In case anyone's interested, some details:
1515 = 1.5" x 1.5"
4336, 15 Series, 4-Hole Inside Gusset Corner
Hardware was most...