I had to “mount” my two AMS-Units on top of the printer and there was no way to fit much of anything (like this https://makerworld.com/en/models/426356) under it, so I created this rails, that should hold the AMS stack sufficiently. I reused the pins from the original model.

The rails are designed with the rear block addition in mind. If someone needs them without it just give me a quick note.