In my opinion , no matter what BL. motor you decide is equivalent to a stock brushed motor, you could never run them together, for all the reason already mention.
I think Roar should leave the existing Stock brushed rules in affect, and just create new Stock Brushless class and rules .
Then offer both classes , and then set a minimum amount of entries for each class , and if they don't get enough for that class, then it wont be run.
I bet with in a short period time, Roar will see that nobody will want to race Stock Brushed any more and the class will just go away.
Just my 2 cents.
