After spending nearly 2 hours setting up one the of the menaces on the pro sport rail I found I've got some sort of OCD regarding getting the vertical cross hair absolutely vertical on the rail... Almost so perfectly central to the barrel and action it's never spot on. I set it. Look though it, it's right, go away, come back and the fecker has moved, only half a mil, but it's not right again. I know it's not moved, it's how I position myself on the comb, which is a right handed stock by the way so I'll never be perfect. But out comes the spirit level, but then I'm hoping everything under the r