RE: Will this esc work?
Yes, you can use it. It's a little small for a 400 size brush motor but it will work. The difference between using a 10 and say a 30 is the 30 amp will allow more current to the motor sooner and the propeller will turn faster. I did a test on this one day with a 5 amp control and a 15 amp control and I was amazed with the extra power that the 15 put out.
Bevo