It is easiest to cut strips for Rhys Davis super strip heads. Fillet the herring down to the backbone, then cut the blue upper part off, save as a thinner bait, last call.
Take the silver lower side and trim to fit the narrow head space. A long tapering triangle is a good shape. Brine and colour it. Best to use the right hand side, but the left side can also be used in the super strip head. Much harder to get the correct shape for the large strip holder. one side is curved, the other straight. Do your cuts when the bait is half thawed.