I remixed some triple and quad attachment pieces for varied configurations when attaching to the wall. My installation was very symmetrical so required some altered versions and thought I'd share and maybe save someone some time.
Also, I remixed the MK3S+ size honeycomb matrix into a couple of other options that you can used to cap off runs of the wall matrix if you are like me (anal) and require the whole setup to be symmetrical rather than just stacks of the base size.
The author remixed this model.