Yeah, this is probably what I should do. I'm not an engineer, and only kind of handy...but I'm having some fun putting it together the way I want it, and I'm all in for right around $100 at this point (once I return the rejects or repurpose them for other projects.)
Thanks so much for the in-depth reply. I have experimented with both the full and half strut styles, and had landed on the half strut. With the shorter height, it deflected less when using it to anchor my bed cover. I hadn't thought about finding the trail rail size itself (since it wasn't in...
For those using strut for a trail rail-like system, or any engineers looking to volunteer their services, is there any reason one would need steel strut for tie-down rails? Aluminum looks to be cheaper, and in my mind, the M6 bolts are the weak point in the system. Is steel overkill?