The 71-5150 Universal Alignment Telescope Bracket is the most adjustable 4-cone mount ever made. This bracket is really a stand, and gives you over 2 inches of precise vertical adjustment and another 2 inches of side to side adjustment. The 4 cones each individually adjust, and the front 2 cone unit can be changed out to a optical sphere mount with just 3 screws! These are very hard to find....