For HSMWorks 2011 we added a new check surface option called "Touch check surfaces" (name subject to change).
Normally you use the check surface feature to avoid machining of selected faces. When you enable this new option machining is instead forced for the selected faces. This can often be convenient as
boundaries only confine machining in 2D and not 3D as is the case for the check surface feature. Gouge checking for linking is still done against the entire specified model so the option is safe to use.
The "Touch check surfaces" option (disabled by default).