I am looking for advice on double blades. I am taking over quite a few lawns formerly done with a leading brand commercial mower, for the reason they never did a decent job mulching even at a higher blade-tip speed. Can I put doubles on my Lazer Z HP. My goal is to completely outperform the leading competition with the best combination of speed and quality. I would like to prove the superiority of my mower over these other mowers. I need to eliminate the need to go over a lawn twice when the grass is very thick. What do you think? Any feedback would be appreciated. I was told by some that I could burn out the clutch, but I thought it was a 200 ft-lb clutch and my 23 hp Kohler engine only cranks out about 35 ft lbs.