Trev I take your point and will reduce timing to reduce blurring.
I have been imaging at 6.5 minutes but could reduce the red time to make up for the blue time.
Just had another thought Paul, you could use the new derotate function in WinJUPOS to create new versions of your 3 channels that are derotated to mid point of the G channel or maybe even just derotate to the mid point of each channel, which would still effectively be well within 6 mins overall.
Regards
Trevor