I working on a SHO project with M27 and just hit the 10 hour mark so I peeked at my progress to date by integrating the three NB channels. I increased my subs to 300sec for the SII filter since the 120sec ones were looking weak as they were coming in the previous night so now I have both 120sec and 300 sec subs for SII (the Ha and OIII are 120sec subs). My integrated stack for the OII is looking pretty blown out but the Ha and SII look good. Two questions. Short of re-integrating the OIII with a reduced number of subs at the expense of SNR, how do I reduce the blown out effects of the OIII? Secondly, how do I combine the 300sec and 120sec SII subs into one final integrated stacked image? I'd like the capture the data from both exposure lengths. Thx!