In the midst of having no focuser for my RC8,
A good friend of mine gave me his GSO 8" f/4 to have a play with last night. I was curious to see how of the difference f/4 makes to f/8, and what imaging at 800mm with the 8300 sensor was like. Spurred on by Peter M's work and processing technique I decided to give NGC 3576 & NGC3603 another go. I'd also like to add I had no coma corrector available!
General setup
Mount: NEQ6
Imaging Train: 8" f/4 newt - OAG - FW (Baader 2" NB set) - QHY9M
Guiding: Lodestar used with a TSOAG9, 0.5sec guiding
Image processing: Captured in Maxim 5, Dark subtracted and Stacking in DSS, Editing in Photoshop CS6
L:R:G:B -> Ha:Ha:OIII:SII -> 1200sec * (5:5:2:2) subs
I am quite happy with the outcome, given no coma corrector and no 10:1 knob on the focuser (Focusing at f/4 is REALLY tough). It was more just a test to see if I can improve my processing technique. The first image is the resultant, and the next 3 are the individual HA OIII SII subs used (In that order). For good measure I have added my old attempt at Tri-NB processing which was done on the same target with an un-collimated RC8 (http://www.iceinspace.com.au/forum/s...d.php?t=103466).
Just for fun I've uploaded another Bi-colour NB attempt (Gabriela Mistral, 3*900sec) and a Ha shot (4*1200sec) of NGC3576 with the RC8 when I had my focuser 
Same setup as above, taken with Ha & OIII (3*900sec each) and no darks.
Thanks for viewing!