Guiding & IC 1805

When I re-arranged the scopes on the mount I was able to make a more rigid attachment for the guidescope which appears to have made a very noticeable improvement in the accuracy of the guiding. It seems that flexure had been a major component of my previous guiding problems all along. After IC 63 I moved on to IC 1805 which is at the centre of the Heart Nebula in Casseopeia. While taking the subs the guider was working the best I have ever seen it on the main scope. It was therefore disappointing to see the transparency starting to deteriorate quite badly when I was hoping to get a larger number of exposures with the scope working so well. Details: 10x 10 minute exposures @ iso800 with CLS in DSS, CS2 & XAT.