I just bought a sthil 100 edger from my local dealer. I get it home and try to test it out on my buddy's lawn because he hasn't had his lawn edged in over a year, I want to see how much power I was dealing with. I cranked it up to full throttle and attempted to edge the lawn but my blade stopped in its tracks. The sad part about this is his lawn doesn't even have a strong root system, it full of weeds. To make matter even worst, because it was so hard to edge I ended up butchering the edge on his lawn. Now I know Sthil doesn't make junk but I thought this piece of equipment would be a bit more powerful then that. I was talking with another LCO and he told me that they can be adjusted to get more power. Does anyone know anything about that? Is there some sort of technique to use when edging lawns with and overgrown edge? Or did I just make a mistake by buying this trimmer? Let me know something because the growing season is fastly approaching and I would hate to have this same experience with a paying customer. Thanks in advance.