You aren’t kidding they are hard to move, I was mounting them backwards to work the layout out first but I just found this remover tool today and it makes it way easier!
It's a good system. There are an insane number of tool holders already available for download, and it's pretty easy to design your own by sticking the existing male hexagon part onto a model in fusion 360. Note the direction of the hexagons when mounting the panels... I had these rotated 90 degrees at first without realizing, which means all of my tool holders would have been at the wrong angle lol. Had to patch some holes and remount the panels, ugh.
I printed the panels using the full width of my large 300x300mm print bed. I have three of them mounted to the wall. There are several sizes available though, you can always merge more smaller ones.
It's actually just a shorter version of the tall basket model that was available. I originally meant for it to hold my alcohol bottle, but it was too small... then I discovered it fits the canned air perfectly.