Roller Rocker Side Clearance

The issue is with the wear I am seeing on the sides of the rockers and the shims even though the clearance is on the low end of the spec at .008.

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Got an email back from the tech at Harland Sharp. He recommends .015-.018 clearance cold that I could achieve by mixing/matching the thin spacers to achieve. I understand 440 Source recommends .015-.030 for a similar rocker.