I tapped the center of the t slot and attached the angle brackets then bolted to the x bracket. I think it was an m4 bolt but am not positive (poor memory) Pretty sure I tapped the t slot 5/16" x 18How do you attach the x bracket on the noops to the T slot?
EDIT : Just want to mention I did not design the rack. A member here did all of the design work for me and I just ordered material and assembled. This was the first time I had worked with t slot