Hi Peter,
Nice picture.
I think that you'd be struggling to get any real detail in this object without extremely accurate tracking. I images this a while ago, using an adaptive optics unit and my RCX. The result is
here.
The telescopes are similar in focal length, but your stars are a bit elongated, which is either tracking or registration.
I have taken the RGB for this one, just haven't gotten around to processing it yet.
Cheers
Stuart