compound creep, the depth changes when I lock it

Set a finish pass on the compound, snug the lock, and the tool moves in a couple thou. Every time, same direction. I can plan for it. I'd rather not have a ritual.

The lock is pulling the slide as it clamps. Back the lock screw's shoe, or the gib on that side, until clamping doesn't shift the dial. If you just memorize the jump, the jump will change the day the shoe wears.

Shoe had a burr where somebody, me, overtightened it last year. Stoned the burr. Lock doesn't shift the dial. Ritual cancelled.