I got 22 x 10 min Ha, 23 x 10 min SII and 20 x 10 min OIII for NGC3576. All Gain 0, Offset 20, at -10C. 36mm Baader 7nm filters.
A quick'n'dirty process in PI using WBPP and some basic tweaks:
That's at 20 percent of the cropped image (the popup, not this thumbnail). I had to crop because the Ha was done on a different night to the OIII and SII and had different rotation because of my spacing tweaks to the scope.
Full image here:
https://imgur.com/gallery/69uHFOL
It seems the darks combined ok to a master, and the flats also appeared to be ok.
I think that's not too bad for a first "image" from the ASI2600MM.