I have been using the Meg-Mo blades on my Gravely 34Z for two weeks now. Pro's; The 15 hp v-twin has the power to run these blades with no problems, their is no loss of power what so ever even in tall thick wet grass. Using accelerator grass catcher, they pack the catcher tight, even with wet grass. Side discharging, clippings are throwen out two rows over in little tiny pieces, wet and dry grass. Con's; Cutting wet grass, the deck gets packed tight. I had to return the ACS, the 34Z's deck is to small and it will not fit, instead I got a Vulcher II and it works great using the Meg-Mo's in moist to dry grass. Does no do to good in tall wet grass. I went back to using the regular blades for now with all the grass growth going on.