I got a mod from the swap , and it does not work like is supposed to .When it turns on is a horrible sound when is runnig like is not balance and not enought flow ,but when i cover some of the cuts it works great and good flow ,is there something else that you can do to stop this and have it work the way it supposed to be ,and i try 2 maxijet 1200 and is the same to both of them any output would be appreciated thanks .