My son runs a B44.3 with a 10.5T and the HW xtreme stock ESC with a fair bit of timing. No heat issues and he competes regularly against other 4WD with 6.5 and 5.5 motors. It is not the ultimate speedo but he runs at regional events like Silverstone and was competitive.
For the money it is perfect as you can start with blinky and build up from there.
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