There are two problems common to the kite, if you hold the scope in a solid position and look at a reference point - you can do this in daylight with the cover on - move your head up and down and the graticle should not move on your reference point. If it does the tube needs to be shimmed correctly. The more serious problem is doing the same procedure this time rotate the focusing sleeve back and forth, if the graticle moves then there is a problem with the focusing lens not being perpendicular to the incoming light. What happens is the focusing lens turns slightly as you cycle the focus, if t