Yakima HD bar / Retrax Pro XR rail modifaction to eliminate potential damage

Yakima recently made a change to their tonneau cover adapter kit to stop it from damaging the Retrax Pro XR rails from being damaged. The side rails were being stressed up at the bolt contact points due to stress and over torque.
RUclips user Ian Fox shows some damage in this video caused by the old hardware.
• Yakima Overhaul HD & R...
Yakima has since updated their adapter kits with new hardware to address this issue, but I feel they didn’t go far enough towards remedying this.
I personally wasn’t satisfied, and felt more could be done here. So, I made an insert to go in the HD bars that should eliminate any further possibility of damage. Obviously over torquing can still cause damage but this should go a long way to helping reduce the potential damage. I still feel they should have modified their extrusion process in the base to address this instead of going to slightly bigger bolts as a solution. But this video will show how I tackled a still present weakness in their design when merging the two brands.
Not to harp on Yakima too much, I still absolutely love the HD bars and Retrax tonneau cover and how they look and work together. I just feel better knowing there is a lot less potential for damage now using this modification/addition.
I hope this helps someone else who’s looking at purchasing or has purchased this set up.
I am lucky in that I have access to machining equipment to do this. But it could be done fairly simply by someone that doesn’t, by purchasing an aluminum bar stock slightly over the channel size and filing down with hand files or angle grinder. Then possibly epoxying it in place to make up for any discrepancies. Making sure you have the holes in their proper spots prior to gluing and then cleaning up the glue from the drain holes.
If you are careful in your filing/sanding when reducing the size to fit the channel then gluing wouldn’t be necessary to fill the voids. Mine is not glued in place but was machined to tight tolerances to be a friction fit in the channel. I only suggest gluing to reduce discrepancies in fit so to not have any gap that could allow room for the T slot to bend upwards.