Wall mounted modular pencil holder

Suffering from Horizontal surface syndrome I am trying to move everything vertical now. I made these to be table mounted first see here:https://www.printables.com/model/1419141-table-mounted-pencil-holderAnd modular version on here:https://makerworld.com/en/models/1810247-table-pen-holderFrankly I am done with Skadis now having at least one in almost any room of my house and start to feel like this more permanent solution will help me stop changing setup and rather focus on work itself.