Sure, ESC temperature not motors.
Oh, I guess I was too quick. I will get a contactless thermometer
Contactless Thermometer shows the temperature of the motors to be 57C which is hotter hotter than my 3.5 build which get to 40C. So, it was just a newb mistake. Sorry.
It is disappointing that this quad has a flight time of only 4-5 minutes. I was hoping for 8-10 minutes for indoor flying.
Thanks @amilcarlucas , @Janno, @Allister. I will need to wait for the summer here in Canada for further tuning it. It will be -17C with wind chill today 
It’s about +1c in Alberta, but the way the wind is blowing the quad would end up in the East in no time.