I recently bought a Vortex Venom 6MOA RDS for my Smith Model 617. I mounted it on the gun with an Alchin mount that fits in the rear sight channel on the top strap of the gun after you remove the stock rear sight. The mount and the sight are both set securely to the gun. My trouble is when I went to sight the rig in this morning, I’m out of vertical adjustment. Specifically, Ive run out of adjustment in the down direction and I can’t bring the POA down any lower to where the POI is. It is shooting about 11” high at 25 yards, and I’m out of adjustment to correct this. So I got to thinking. What if I could shim the sight at the front or rear to adjust the angle at which the sight aligns? What I can’t get through my head is which end I’d want to bring up - the front or rear of the sight? Anyone had any experience like this? Any help would be appreciated!