My best yet with the orange tube 8" SCT & 900nc.
Seeing was not nice to me ranging from 4 - 6.5 at times & therefore couldn't get to my biggest image scale that I can use....yet
2 X barlow + extension tube.
5FPS / 1/25th sec. / Gain: 75% / Brightness 75% / Gamma 20%.
1300 stacked out of a total of 2600 frames.