Scott, KingTech isn't flawless by any means, as we had our share of growing pains, but thank goodness temperature hasn't been one of them.

I'm pretty sure if one sticks the probe in further than manufacturer suggested, will get a hotter reading, likewise, if you pull it out some, cooler it reads. Why there's such a difference in the depth of insertion between brands?? Perhaps types of probes are different? or perhaps ECU auto compensates for the final value based on set up? As far as with Gaspar Xicoy ECU, it requires 2mm to be inserted into the cone, and I remember Jet Central manual also concurs at 1/16" to 2mm, that's 1.6 to 2mm.

Here's something from Gaspar's manual that could be found on our site:

4.4 Thermocouple
The FADEC use a thermocouple of type " K ", apt until 1100ºC. The provided standard thermocouple consists of a wire of Inconel of
1.5mm of diameter finished in a connector who fits directly on the FADEC. The recommended installation consists of practising a drill of
1,5 mm in the exhaust nozzle of the engine and inserting the end of the thermocouple so that it be 2mm within the flow of exhaust
gases. Because the sensible zone to the temperature is the end of the thermocouple in any case DO NOT CUT it since it will be
destroyed. Also, do not bend it with pliers or other utensils that cause very acute angles of curvature. The installation is due by
hand and the curves must have the greater radius possible. In principle any type of thermocouple " k " can be installed, but it is
necessary to consider the thermal inertia of it, since the temperature of the engine can raise much quickly that the one of the
thermocouple and cause not controlled situations of overheating.

Anyways Scott, I think you raised some very good questions and comments, perhaps one day we could have you to run a KT in one of your many beautiful jets

Cheers,
Barry