I thought about putting them tight, but I though having the same number as factory would make people think twice? I can also simply buy another SS strip and make it simple, but then the widths don't stay the same across the bed as the outer edges will be thinner I believe.
I was wondering about simply tapping the cross bars for the bolts as they will not need to be super tight. Seeing that you used self tappers I think I got my answer that I can tap it. Maybe I will get anal and put all the washers and nuts on?