I finally found a tool to analyze CID fonts at
https://github.com/janpe2/CFFDump
I noticed two things:
1) the MKIX Top DICT INDEX doesn't contain /version, but the string is
   in the SID.  Unfortunately merely adding it to topdict in
   tablewriters.cff doesn't fix the printing bug.  But I'd still
   recommend doing so.

2) The Private DICT doesn't contain /StdHW /StdVW /StemSnapH /StemSnapV.
   Also BlueScale is 0.
   This should not matter for printing(?) but it explains why
   Adobe displays it differently! The hinting information is missing.

   Note that the code would copy this data but it's missing in the
   cffinfo already.

I'll attach both CFF dumps here, perhaps someone finds other issues.