Still busy on building my cube observatory but as tired as I was I had a go at Omega Cent last night and tried a differrent approach by going with 10 second frames and iso 200 in an effort to reduce star blow out.
70 lights, 20 darks, 20 flat and 20 bias and a tweek in gimp.Cropped a bit to help downsize
Used 8 inch f5 and nikon unmodded d5500.
Also tried eta using high iso (3200) which worked ok.
alex