Was wondering what I'm doing wrong or if I'm using the wrong tools to sharpen these blades. I've taken them in 'til now for $7/blade but wanted to see if I could do it and save some time, $, and gas. It was easy enough to sharpen them, only took a few minutes per blade, but then I can't seem to get either blade balanced! Neither appears bent. I grinded for about 10 minutes straight per blade, on the side that was tilted down on the balancer. I didn't want to wear down the cutting edge too much since it was already sharp so I grinded on other parts of that side, mainly near the end. Still no luck, not balanced. The kit I'm using is from lowes, it was about $7 for the sharpening kit that I just attatch to my plug in black and decker drill. Should it be harder to balance a blade than it is just to sharpen it? I'm sick of this and feel like putting them back on the machine since they are both good and sharp. Anyone know if I should or what I'm doing wrong?