Ok hypothetical scenario. SBIG offers a CCD Sensor transplant service. What advantage, if any, would be gained from transplanting the sensor from a ST-8300M or ST-4000XCM into the updated Aluma body?
It is probably not a bad move on their part as it would let owners with still good CCD sensors who want to stay with a CCD update the supporting mechanics and electronics now that supply of new sensors would be drying up.
As far as the 8300 sensor is concerned from seeing many hundreds of images the QSI683 with the 8 filter filter wheel and built in OAG is the king of the 8300.
I would sell what you have and put the money towards a second hand one of those. They are now selling for cheaper as people move over to CMOS.
No idea how good/bad the SBIG is just the QSI beats everything else I have seen for the 8300 sensor.
If you mainly want to couple it with an AO unit then I assume the Aluma does that?? To do that with a QSI it requires the Starlight Express AO unit.
Also a ZWO or QHY268 would be a superior camera in almost all metrics.