Denpanel variable hook system

Danish company Denpanels sells acoustic wall panels. They are made from a felt backing with wooden slats attached to it. There is a space between the wooden slats, and this is where this hook and rail system can be attached. There are plenty of hooks out there, but none of them are variable in height. These are, and there will also be future creations with holders for shelves or flower pots or lamps… Best printed in black, so the optics of the black felt are not interrupted.In my place, this is screwed onto a drywall. Hold the panel to the wall, hold one rail in a slot in place and drill through the hole in the slot. Remove the screw, remove the panel, drill a hole and insert a GK dowel. Replace the panel, replace the rail and put the screw in. That will hold the panel in place. Take a second rail and place it in another slot, same height as the first. Repeat the process. Once two rails are fixed with dowels, you can either fix the other rails by just putting screws directly into the d