WOW heaps of colour and detail - fantastic Enrique, that 14" makes a huge difference. Though the image does exhibit some "coma" like effect with the stars around the edge of the image being slightly "eggy" in their shape - more on the right side. Maybe the camera is not sitting quite flush or squared up to the optical path?
I am using the Lumicon Giant Off Axis Guider. There is a small misalignment somewhere. I have tried everything you can think of including using pliers to super tight all the screws. I always get one corner out of whack; most of the time the top right one.