Novaks 13.5 pro is only about .3's faster than a good blue printed Co 27T. I'd say its close enough. But I do have to agree the KV ratings can be confusing, Castle does happen to give motor equivelents, Ex: 5700Kv= 9T brushed, Well atleast thats what is says on the box. Why LRP would come out with a 13.5 and say its closer to a 23T is beyond me, maybe since 23T is the stock motor of choice overseas, is the market they want to reach. I'm hoping Bob Novak is working with ROAR and others to get some sort of stock BL rules in place by next year, right now it does seem like a wild turkey shoot.