I've been running 3-axis machines for quite a long time.

However I never really gave much more thought to putting in bushings holes in a fixture on a compound angle, other than to use 2 sine plates.

A long time ago I was party to installing similar holes using a picker head. But don't really recall the proper method.

Has anyone done this, and if so what is the best method to achieve accurate results in positioning. Within <.001" tolerance?