Without the triangle filler pieces (which fit horribly and created buildup), the mower left 2 strips of uncut grass. They weren't totally uncut, just not cut at the same height as the rest of the grass. The crispness of the cut was NEVER there. It wasn't until I tried VX4 blades on it that it was even coming close to getting acceptable with being table top smooth. Problem is, the 28 EFI Kohler could barely power the mower up a hill under normal mowing conditions with the factory blades. Now with these taking another 5hp to spin, it always became a game to keep RPM's up enough to suck up and cut the grass. Meanwhile, the fuel economy of the 28 EFI was very close to 2 gal/hr. I think a little more discharge blade front baffle spacing, a more powerful engine, and trustworthy hydro system, and the XR-7 era machines could be a good combo.