The image "PluXConnector.png" needs to be updated/corrected. Currently, the image documents connector overlaps between PluX22, PluX18, and PluX8, but not Plux16, or PluX12.
My suggestion is to update the image to remove all references to PluX18, and add overlap definitions for PluX16 and PluX12, with a footnote explaining the PluX12 is defined by NEM but not by the NMRA.
As published, the file "PluXConnector.png" appears to be a secondary image generated from an original image. The proposed changes should be made to the original image, rather than the secondary image. Can someone point me to the original image? If not I'll create a new original from scratch.