Black Max and some other Loctite numbers will adhere a steel shim to the hook. SS feeler gauges are pretty springy but some sort of round bar for clamping (Mike Orlen uses transfer punches; the graduation by 1/64s allows you to find just the right one)may shape it to the face of the hook while the BM cures. Anyway, no one is pulling your chain; shimming does work.

jack