I run 21" Snapper and the blade edges break from hitting the softest of debris. Also the more important issue, there is some seriously uneven wear on the blade that is hard to remedy with normal sharpening (I have some "sand lawns"). The end of the cutting edge becomes increasingly rounded and contributes to poor mowing on the outskirts of the 21" path. What are my options? It would be nice to have two mowers in my truck, one used for sand lawns and the other for good lawns, but there is not enough room for my backup mower in my truck. This is one of my few problems I am currently having and I would be willing to pay a lot for a reinforced blade. Otherwise, I was thinking of buying a quick manual sharpener to scrape the blades with every 5 lawns of so....... what do you guys think I should do?