Vortex lo pro bubble level - Vortex Lo Pro Bubblevel for Rifle Scope Tube

My shots to 500 yards were grouping right despite a near perfect 0.8 MOA centered zero at 100, so I realized that I was canting the rifle. Bubble level to the rescue. With the Spuhr mount and Razor Gen II the scope had to be dismounted for installation. My scope also had to be repositioned fore/aft to allow room to locate the level just forward of the turrets where it would be out of the way but visible with my non dominate eye. My setup had just enough room to accommodate it. The included paperwork did not specify the torque specs, so I had to contact Vortex for them: 12-15 inch/pounds. Tightening the level on the scope is tedious as it mal-adjusts where the level sits... I am a bit OCD so the set/torque/loosen/repeat/repeat/repeat took some time for an acceptable result. I used the plumb-bob and flashlight method of projecting a vertical reticle in a dark room. Once close, the 3"/# torque window afforded some help centering the bubble, at least. I like it well enough that I purchased a second one for my wife's setup, and Optics Planet has the best price by far. Good luck!