I've got some airline track to install with rivnuts when I get time. Like how you added the loops to the standard holes.
Did you drill them out or use the standard size?
Ended up having to drill them all in the end ...I ordered one lot and they were pretty loose in the holes and the bolt heads were too small for the factory holes in the panels. Ordered the size up and they were about 1mm too big! Drilled them all with a cone cutter/step drill so it wasn’t too painful... just wish I’d done it before insulating!