Thanks for the info, the extra aperture sure helps get the detail. I've seen others talk about the improvements WJ can give with stacking multiple sessions (for instance see this link
here ), but I was afraid of making it worse by getting the time or orientation wrong. Being on an altaz mount makes it more difficult (as I'm sure you know well) since the orientation of the planet is not constant.
The change in colour balance between the two cameras is interesting, how do you choose the final balance?
But it sounds like it's worth another try with WJ.
Andrew