I have been using an 2 EB 630 for a few years and this year they both went up within a month. Just went out and bought a EB 802 and it feels like nothing compared to the others. Does 10 MPH really accumulate to that much difference? Is there a "break in" period to see more power or something I need to alter to get it to run better? I have been using only Shindaiwa since I started my business and have been extremely pleased until I bought the EB 802. Any input is appreciated.