I have a Zulus 3-12 LRF V2 & 0MOA rail fitted to my RAW HM1000 Microhunter which already has a 20MOA rail and when I've zeroed it at 30 yards the vertical Y axis is 61 which seems a lot and means the LRF box is quite low down the screen and only works up to 9x mag as any more and it's off the screen so will shimming the rail to get Y nearer to 0 bring the LRF box higher as well? If shimming will work, then do I shim the front or back to get Y down to 0?