Your mount has a recessed area at the bottom of the front ring this is for the scope's dowel locating pin . this will have to be enlarged from the center line of the recess right and left this will allow you to cant the scope to center your scope cross hair and post . Also be aware of the fit of the scope in the front ring ,most of the after market scope mounts including the ones made by RSM are way out of specification and when the rings are fitted they will bind in the scopes area to receive the rings .If it dose you have to shave the face and the rear of the rings to insure there is no binding .I had a original No 32 MkI scope the would not a line the post and cross wire unless the after market mount was reworked as stated above . Never remove metal from the scope . Remove metal from the mount it is the lest expansive item and if you make mistake it is ease to replace.