So here’s a theory. what if one motor is a few KV lower than the other. my primary is 184kv vs 182kv on the secondary ( according to lambda based calculation from FOC detection of lamda) or 175kv vs 170kv (according to BLDC detection + kv command in vesc_tool )
the primary has the higher kv, the higher temp, and the descrepancy is largest when i as at 95% dutycle for a stretch at the beginning there.
blah. words. 
VESC flux linkage measurement is about 10% under compared to oscilloscope measurement.
@fessyfoo does that count?
Forget about the thing in front, the white box with dual side heatsinks? It was sized for bare ESCapes but not really e-board related (for a board it can be made smaller and boxier)
Eventually for a MTB with top mount 
taking that plate out is invasive, and will be a pain. deferred a bit.
Both focboxes replaced now with focbox 1.6. ( supposedly cooler on their own vs 1.7? )
Also replaced their thermal pads (fet to case) with Thermal Grizzly minus 8 thermal pads. ( 8 W/mK )
I then did my heat run
I think it did really well. never broke 80c.
the run has 3 phases of hill. often I could get close to 80c on the first phase and consistently on the second phase. With this setup on a hot day ( 34c esc temp to start) I made it all the way to the top without breaking 80c on the ESC. ( and motors got too hot. )
Not too scientific as I don’t have a good record with before data on this proto#2.
163’C motor??? 
That’s sensor noise. 
