modify extrusion bars roof rack

I cant remember where I saw it one of the FB groups or forum. But I saw a picture of an opening in the extrusion bars to make it easier to insert t-slot nuts or carriage bolts without having to un bolt the extrusion bar on one side. Does any one have a link to the bars or a link to a video on how to modify my existing bars? I would like the ability to take off equipment because we have had some thefts around my area and I would like to change up the way stuff is set up depending on what I am doing with the truck. 2x1 aluminum extrusion bars

 

On my Prinsu roof rack and the few extra Prinsu extrusion bars I have, one side looks like that, but the other side has two offset openings on either end for installing stuff in the T-slots.

Have you flipped the bars over to check and make sure they aren't upside down? If they don't, maybe they are a different brand than mine.

(Not my picture, but you can see the slots I'm talking about here)

 

I believe Prinsu added the openings relatively recently. Originally, they didn't have them.

You could make the openings with a Dremel grinder. They might not look quite as neat as the factory ones.

 

May not be what you are asking for but you should be aware of what is available. 80/20 T-slot Aluminum Building System (8020.net)