Has anyone else installed a Wolf mainspring in a round butt S&W K OR L frame, and had the rebound block hit it when cocked ? With the sideplate off, and the strain screw tightened, cock the gun. The ones that I have installed, in newer round butt Smiths, touch the rebound block when cocked. Should the corner of the rebound block be filed to allow enough clearance not to hit the main spring?