Peter, lovely image. QHY8 I assume? I have beek checking out some of the better QHY8 images of IIS users... yourself, Trevor and Louie have produced some beauty's (though Louie used the Starlight Xpress varient of the sony chip - M25C).
I just grabbed a used QHY8 Pro in the classifieds, so I may need to 'chime in' for advice if that's ok
Logie.