old Skywatcher "guide scope" mod to "guide camera" with IMX290 sensor

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The 2 Mpixels SONY IMX290 sensor is great for guiding. I bought a camera with its lens. It is easier to center... Remove the locking screw and unscrew the whole lens. I had an old skywatcher (the blue one) guide scope that I moded to a camera guider. Just unscrew the eyepiece, unscrew the ring. Now mount the ring and screw it with the nut facing the inner of the scope. With 4 drops of B7000 glue the mount on the tube of the camera and let it cure. Just screw the camera and its mount on the guidescope. Focus can be easily reached when rotating the guidescope tube. Infinity focus is reached when the body of the camera is nearly in contact with the 3D ring. To install the cover, unplug the USB wire, slide it into the cover. Install the guidescope on its support on the telescope. Gently push the cover over and around the PCB then around the guidescope tube. You can adjust the focus rotating the whole cover. Et voilà, ready to use in PHD2. As the IMX290 is a plug and play camera on Windows, PHD2 recognizes it as a WMD camera. I think the focal length is 180mm and, as I image with a 200x1000 + canon 2000d, the guiding ratio is around 4.35 , so I guess it should do the job !… Waiting for a clear sky to test it in conditions... As it works, I'll install the cover ;-) EDIT : first functional tests OK, the camera is guiding the EQ6R pro ! (see screen picture)