Phillnjack, you did ask for advice, you've had plenty, all based on experience and first hand knowledge, and all saying pretty much the same thing. If the advice wasn't what you hoped to hear, that's unavoidable. Whether or not you plan to save 15 to 20 quid, and take a risk with the esc from a company that can't even give honest specifications is up to you. I value the work and time that I put into a model too much to risk it.
One last point, I said earlier that I did know those escs, I've had one, non linear speed control, lagy, poor wireing, I could go on.
Your choice, I've said my piece.
Charles