Installed meg-mo blades on one of my 62" SFS Toros with 27 hp kohler. Installation; This required cutting a 2 1/2" slot in the 3 saddles on the spindles. I did this with a 4 1/2" side grinder with the spindles still on the mower and it took a couple of hours of work, with a rest period thrown in here and there. I did not sharpen them before putting them on the mower,but when I did a test cut with them I was not happy with the cut, so I removed them, sharpened them and put them back on. This time they cut very well. Horse power drain; I have often read about these blades taking away horse power and they do bog down the mower when you first engage them. I have started engaging them at half throttle and this seems to work better. At first I thought that they were slowing the mower down more than usual in heavy, wet grass and tested them against an identical mower with Toro medium lift blades. I ran them with one trailing the other and could tell no difference in performance. This did not exactly make me happy since I have nearly $200.00 invested in them. Performance; Like I said above, I could tell no difference in the two mowers. The SFS decks have always been good at side discharging in tall grass and still are with the meg-mos. They do reduce the clippings to a smaller size which does make some improvement in the overall appearance of the cut. I did have an area of thick old leaves that I ran both mowers through and the meg-mos did a much better job of mulching the leaves, even while still side discharging. After installing the blades and testing the height adjustment against the other mower I was pleasantly surprised to find that the setting remained the same. I suspect, and hope that they will be an improvement in bagging, but have not yet had a chance to try them out. Recommendations" I do like the way that they mulch and believe that they will be worth having, if just for this. They are much easer to put on and off than a mulching kit. They are advertised to need sharpening much less often than regular blades, and if this is true this will be a big plus. If this does not prove to be the case then I will use my regular blades for normal mowing. As I said, I had to sharpen them before using because they come with the cutting edge having a very rounded edge. I use a 20" disc sander to sharpen the blades and had no trouble at all sharpening them, although the high heat generated in this type of sharpening may ruin the hardness of the blades. Overall I did not see any great improvement in mowing other than mulching and some improvement in reducing the size of the clippings. These improvements may be enough to merit them and if they last longer between sharpening, and if they increase spindle life then that will be another plus. I will keep you informed as I learn more.