System components include and#9679; An LTO3T optical module probe (OMP). and#9679; A 3D touch-trigger inspection probe (±X, ±Y and +Z directions). This is either a Renishaw LP2 or LP2H probe. The LP2 is more sensitive that the LP2H, which has a greater resistance to vibration and can support heavier styli. The probe is mounted in the OMP. and#9679; An optical transmitter and receiver unit (OMM) and an MI 12 machine interface unit. The interface unit may be either a freestanding MI 12 interface unit or an MI 12 interface board.