Thanks for all of the ideas on here about bed dividers, so here is my take. Thanks to Cave Johnson for most of the idea...

Used the e-track components to replace the box link attachments..

Also used a square wire lock pin to make it easily removable just in case....

 

Looks like a fair amount of work went into it. Have you tested it out for function? ... like does it have anything you would do differently?

 

Just finished it up this morning, so have not gotten to use it yet. There is enough room to hold my golf clubs back there, and my softball bat pack.. clips will hold gas cans and anything else I do not want moving around..