Great machinists know the need for proper fixturing. And they also know the fixturing has to be true to the machine tool motion. I don’t pretend to be a great machinist, but I know quite a few, including Curtis Waffle pictured below in an old photograph. Curtis is a master machinist with 35 years at Flow. The large bed of a typical waterjet machine is an XY plane, and that plane must match that of the machine. If the worktable is not flat to the machine motion it creates ongoing headaches and part accuracy and quality issues for the operator.