Came up with an easy and cheap way to mount Treds to the stock rails:
Four 1/4" X 4" eye bolts:
<a data-flickr-embed="true" href="https://www.flickr.com/photos/wolffman17/32538836366/in/datetaken/" title=" "><img src="https://c1.staticflickr.com/1/641/32538836366_4ff0e000fa.jpg" width="500" height="375" alt=" "></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
Two 7/32" X 6-1/4" turnbuckles:
<a data-flickr-embed="true" href="https://www.flickr.com/photos/wolffman17/32426596182/in/datetaken/" title=" "><img src="https://c1.staticflickr.com/1/782/32426596182_23f9c1ecf2.jpg" width="500" height="375" alt=" "></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
Four each, washers and wing nuts:
<a data-flickr-embed="true" href="https://www.flickr.com/photos/wolffman17/32426596652/in/datetaken/" title=" "><img src="https://c1.staticflickr.com/1/697/32426596652_72d5db773c.jpg" width="375" height="500" alt=" "></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
Thread the eye bolts through the turnbuckle eye bolts, like so:
<a data-flickr-embed="true" href="https://www.flickr.com/photos/wolffman17/32426596912/in/datetaken/" title="Untitled"><img src="https://c1.staticflickr.com/1/556/32426596912_32bc373943.jpg" width="500" height="375" alt="Untitled"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
Secure to rails, like so:
<a data-flickr-embed="true" href="https://www.flickr.com/photos/wolffman17/32538835146/in/datetaken/" title=" "><img src="https://c1.staticflickr.com/1/379/32538835146_c3b712a2c1.jpg" width="500" height="375" alt=" "></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
<a data-flickr-embed="true" href="https://www.flickr.com/photos/wolffman17/32579475095/in/datetaken/" title=" "><img src="https://c1.staticflickr.com/1/307/32579475095_a1d86072e5.jpg" width="500" height="375" alt=" "></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
Pros:
-They are snug and secure. Zero movement or noise.
-Super cheap -- above hardware costs < $8 at Home Depot.
Cons:
-Unsure of strength, but I'm certain they'll hold up. Weight of the Treds and force is on the rails, not the hardware.
-It takes a minute or two to get on and off.
-Many loose parts to keep track of if you have to use the Treds.