XS_DSTV_USE_COUNTERSUNK_HOLES
Category in Advanced options dialog: CNC
If you set this advanced option to FALSE, the
countersunk holes are written to DSTV as straight
holes (pilot holes) without the conical countersunk part, which means that the
bolt's nominal diameter and tolerance are used. If you set the advanced option to
TRUE,
the countersunk holes are written to DSTV including the conical countersunk part.
The default value is TRUE.

(1) Countersunk diameter
(2) Pilot hole diameter
This advanced option is model specific and the setting is saved in the options database.