Does anyone know of any good way of comparing rifle scopes...Im wanting to build some type of device that will allow me to hold 3 or so scopes all at once and be able to move my eye back and forth from scope to scope...would also like to build some type of target to look at to compare the scope's color correction,brightness, image resolution and field of view...I cant remember where but about 12 yrs ago i read an article about a guy that made some type of poster board with lines and numbers on it with colors that he used to compare and test optics with before he wrote a review on them