???
I and other racers have brushless in our system no problem...
I've had a Castle 4600Kv in there (with the Mamba Max) and it now has a 4300Kv Hobbywing Motor.
It's a very tight fit, and the instruction does show to mount the motor then mount the entire rear end onto the chassis...
But with a bit of careful nudging, you can get it in there.
I use the 5700Kv in my B44. What you essentially can do is turn the motor timing to lowest, and it'll behave very similar to a 4600Kv...
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