Received replies from Kenton and Encore:
Kenton: (they POSITIVELY recall the OBX kit worked at least for note on/off

).
Here's the last mail
Massimo
-so you positively recall an OBX kit actually worked for at least receiving note on/off on the obsx, right?
John
-Yes
Massimo
What you are saying
(re. previous mail) is that an Obie tech (there is one here in Rome) wouldn't practically know where/how to install one such kit on an ObSx, or what?
John
-A good technician should be able to get the notes working without too much trouble. I doubt that they would get the pitchbend / modulation etc. going. We wouldn't be able to provide any assistance as we don't have any first-hand information on the OB-SX (we don't have one here). Regards John
Encore:
Massimo
-Someone mentioned to me that an OBX (NOT Ob-Xa) Midi kit should work with an Oberheim Ob-Sx for receiving at least note on/off.
Do you have any experience/comment on this?
Tony
-I've never tried it! There is different code in those instruments, so I wouldn't be too hopeful.
Massimo
-no hope to see any such box implemented in the future...?
Tony
-It's very unlikely unless I discover it's extremely easy. There isn't much demand for the obsx. I would also need to get one here for a while.
So,
anyone volunteering to send them a unit so they can give it try?
(I do not yet own one)
best regards
Massimo