Hi Alex,
This image I took a year or two ago has Ha O111 LRGB and may even have a touch of S11 in it.
http://www.pbase.com/gregbradley/image/66499144
The violet glow comes from the O111. I am not sure I like that effect particularly in hindsight.
The Ha adds the deeper reds in the neb itself plus the background gas/dust areas like this:
http://www.pbase.com/gregbradley/image/93698947
Although I may not push the red so hard and leave it looking more dusty than deep red.
So I plan a couple of hours each HaLRGB, 4 panel mosaic of the area widefield at F3.64 with the FSQ106EDX and reducer Apogee U16M.
Greg.