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I have remixed the base supports for this (raised the whole thing up by three inches) and have them saved...but I don't want to upload them until I get my MMU2 in and measure/test fit it. I have measurements from Prusa, but nothing is like seeing it and getting the measurements myself.
Further thinking one this...I'll try a remix where I split the base that I have made in half. This would require other makers to go and fiddle with CAD software to add height between and then attach them in software. I don't suggest using Slic3r to make them larger.
The unfortunate part from me is I have to wait until February 19' to do this; when my MMU2 is scheduled to be delivered.