Had my stock re-inletted from hinged floorplate to m5. Guy who did it went too deep on the front pillar. Now when I tighten up the action screws it puts a bind on the bottom metal and can’t get the mag to lock up or the release to work on the bottom metal. If I only tighten the back screw (which seems the right depth) everything works fine and it feeds well. I can then tighten the front screw and everything locks up. Are there any shims I can bed on the front pillar to raise it up to the right depth?