Do you guys put a razor sharp edge on your blades or do you put a moderately sharp blade so it wont damage or brake easily. It seems to me the sharper the blade it dulls quicker and damages easier. Not all my yards are golf course quality, some have occassional pepples or twigs etc. I usually put a clean semi sharp blade. I know most guys use a grinder but I have always used a belt sander with 50 or 80 grit sand paper, it last a while and puts a smooth factory looking edge on it.