Video of new brackets for this rack and showing it holding 380lbs
https://www.youtube.com/watch?v=Pz7gc5VVKMg
View of my homemade power rack built with basic materials. Rack is currently in a small 11 x 11 spare room. I used carriage bolts where I could to make it stronger and easier to move if needed. Instead of metal brackets I made my on support blocks out of 2×4 material. Plyo boxes and gym rings are some other items I have made myself. If you think it through and check out some ideas/plans online you can make several pieces of equipment at a much lower price. A bench that is much sturdier than my current one is next on my list of things to make. Hopefully this helps.