May 2024: The below flow chart and list of spare parts (further below) help answer “who handles what?”.
If a PO comes in for a quotation beginning in 858, that is a Service Quote.

Parts customers can replace themselves (quoted by Customer Care)
Joystick box (also called controller cabinet on the part itself)
XXT/XDT sensors
RDS Adapter plates
Air regulators
Styli plates
Styli
ST3 sensors
BIOS or CMOS batteries in a C99N controller
Replacement cables for DotScan or Viscan that attaches from the sensor to the RDS
Cord for joystick box, C99L or C99M controller
Workstations, but may need some assistance from Applications to set up
Spare parts for 3D optical machines such as ATOS or Tscan Hawk
Parts that require techs to replace (Quoted by Service Tech Support via CIC)
Air Bearings
Drives / motors
VAST or RDS probe heads
Anything else in the C99* controllers
Cabling through the machine