I am working on a No1 Mk3* Lee Enfield front sight. I noticed the sight ring which slides ontTo the barrel has a slot for a key cut into it. The slot is slightly off center, looking from the rear it is clocked on what I call 12:30. This causes the rifle to shoot right 6 MOA when the front sight blade is centered on the ramp base. I can drift the blade to the right and bring the shots to center, however I don't like the look of the off center blade on the ramp base. Is this the normal for these rifles? I was thinking of running a file down the left side of the slot and using a brass shim to rotate the ramp base on the key just a little CW. Any suggestions?