Cannot say CSM88 is the finest Blumlein stereo microphone, but...
It is the only single body, 1/2" true condenser Blumlein base on a pair of single diaphragm structure.
All the other single body is large condenser (not single diaphragm), or ribbon.
Or, it is single diaphragm, 1/2" true condenser, but not single body (have to mount them together).
So, I came up with this design: Almost single body (pre-mount into a minimum size, and operate as if it is single body), still Blumlein stereo and 1/2" true condenser.
But, user can re-configure easily, and the capsules can be mounted elsewhere, to form a different pickup setup.
Which one you prefer?