I think that link answered the main problem with this scope , the secondary , its made from an 'ordinary hand mirror' eg. a second surface mirror like I mentioned earlier , a telescope's secondary should be 'first surface' that is aluminised on the front ( first surface) not behind like a normal bathroom mirror , the reflected image has to pass thru normal ( not optical ) glass twice before the image hits the eyepiece , bad practice !!! , this and a spherical primary
well .....
Brian.