I purchased a Vortex 5 x 25 scope with a 30 mm tube and a 50 mm objective lens. The shop where I purchased it tried to set it up with 3 inch Leopold rings and had problems confirming the zero and level. I think that the rings are too high. I am aware that the there are 2 shorter versions of the rings. I have a friend that set up a similar scope with 1.5 inch high rings. Is that correct?