An excellent NGC6744, M&T! And a wonderful & interesting field as always.
I have seen RBI on my Apogee U16M and also the FLI PL16803 we use at SRO. It's definitely an issue with the sensor and not a specific camera brand (but the sensor temp makes a big difference.) We use RBI preflash at SRO and that fixes the RBI but adds noise and requires more subs. TANSTAAFL
