All of the above is correct BUT in most cases, short extensions can be added as long as you re-calibrate the unit after the extension is added regardless of thermistor or thermocouple type. The non-linear portion of the system is probably outside our temperature range for this discussion. I have had techs who do this type of thing in the field (different industries) without asking and everything is fine.
Rude Mood Competition BBQ Team
FEC100, Primo Egg w/controller, Memphis Pro, Custom Stick Burner, Assassin 28.