Got my RadRover 6 yesterday, put it together, and took my first ride today. 21 miles. After putting about 2200 miles on my RadRover 5, I notice that I'm using more pedal assist and/or bigger gears on the RadRover 6 - while doing the exact same ride. I also seem to be using up a little more battery. I know they are using a new algorithm for pedal assist, but other than that, does anyone have any idea why the 6 seems to require more effort than the 5?