I finally changed my 8 inch Celestron to the mount. I've tried it few times earlier but I've never took proper images through it. Biggest problem is that I bought Meade's f/6.3 focal reducer which has really short distance to the chip, only some 55mm. And I have OAG and filter wheel in front of the camera... And because the distance isn't right, there's quite bad coma near edges and OAG's mirror and that causes really odd shaped stars to the guider.
But when I finally get everything working I was quite satisfied with the result. Even though seeing was awful, FWHD was over 4 all the time.
Here is sleeping beauty galaxy or M64 of constellation Coma Berenices. Exposure is 2h 15min of Luminance and 4*5min of RGB (bin 3*3).
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