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Thanks everyone, for your comments.
Yes the conditions were good (as good as I have seen in 2 months, since I started imaging Jupiter)
One thing I am going to try to see if there is any improvement is not use the Heated dew stopper and have a fan on a pedestal blowing ambient air over the corrector. Many years ago when using the Celestron 8" all I used to prevent dew was just that. Seems to me the Ice packs around the tube are fighting against the heated dew stopper. Last night when humidity was high the ice packs were not bringing the scope temp down to any more than 1 degree above ambient.
On the 14 may when I took this shot the tube was the same as ambient. And as the seeing deteriated the tube temp climbed above ambient by 1 degree. So its critical to keep scope at ambient. I know you chaps know this already, but it may help someone else who reads this.
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