Fellow Sling 4 builders, I've been told by the factory that the current Sling 4 panel's height is 12.5" and not the 11.74" I was told a couple of years ago.  So, make sure you get the latest CAD file from them.  They've sent me a file, but it is not blank, so I'm trying to get a version that is blank.

If anybody has further info on this, that I'm not aware of, please let me know.