Ed,
I might not have the best solution, but this works for me, at least for all my RO90 abrasives. They fit perfectly in those yellow boxes.


The HF storage boxes are almost same size of the systainers, so they can be stored in one of my shop made sysport, and can be placed on the drawer if the rear stopper is set a little deeper (5mm).


I have a few pieces of sand paper in each grid stored with sander in the same systainer, and the rest of them are in one of these box, so that at least I know where they are. I am guessing it will not survive the job site, but works in my shop so far.
JZ