The design is optimized for low filament usage. Print with PETG, then hammer together - extremely low tolerance should yield a tight fit. Use the spacer (adjust height if required) to screw to wall with 3mm screw.  Screwholder to add more fixation points besides the included ones. Use the plug to fix accesories so they don't wobble.

The ‘hole frequency’ is lower than with the original version. This means that accessories requiring several holes in a fixed distance may not work. Though i haven't had the issue in practice.