Same setup to mine Chris except I was running 21/87 with a 5.5T Redline at Southport this weekend so 23 for a 6.5 would be what I'd also choose. It was a hot humid day, so a good test - all OK for me. Yes, I know the motor is too quick for my ability
In the past I have had my Tekin RS Pro thermal but that was when I tried running in Sensored, rather than Dual mode. No doubt about it sensored ran very hot. Also, it could just be coincidence, but I feel my ESC and motor seem to run cooler after downloading the latest ESC firmware.