Do Maxx-ER centering plate feet need to be ground after installation?

The reference feet need a finished mounting surface. For the Maxx-ER reference-foot installation described here, the specified height is 11.20 mm with a tolerance of +0.01/−0.05 mm, and the reference surface must be flat within 0.001 mm.

Separate plates and feet can require finish grinding after assembly. Complete holders supplied with their finished reference interface are already prepared for use. Follow the installation drawing for the particular component, and use its specified screw torque; excessive tightening cannot compensate for an incorrectly finished surface.