Thank you..

Quark esc is very very smooth control, so i put a heat sink on the underside.
heatsink just like CPU Pentium2 with fan.
so i am try test run again, the esc just warm..but motos get little hot.
sorry i not use temp gun.

Here is second time test and run video, OMG... too faster tire look like crazy...
Here.. http://yungshen.myweb.hinet.net/crt2.wmv