Bedding Setup on the Bench:
Now that the action is positioned on the bench, shim the backrail to be stable. Do this with front punchings, placed every twelve to fourteen inches. These will support backrail and frontrail the way glidebolts support the balancerail. Share the weight evenly between these points of contact. And when done, draw placement markings on rail, punchings, and bench so that if the keyframe is moved, when it is returned, the shims can be placed back in their original locations.