I have a new Exmark Lazer Z HP, 52" trivantage, 23HP Kawi. It seems that I am getting a lot of buildup on the deck with the factory blades (Excaliburs, I think) I also have a Scag, 48" WB...It does not "collect" this much on the deck. I have just applied MO-Deck to the HP.... hope it helps... I do not use it on the Scag. I DO run one high lift (discharge side) on the Scag. So.... I have a couple of questions....... What is the best blade to run (discharging, not mulching/bagging) on my HP? I do not want to run doubles because of the lower blade positioning (scalping, etc) Also, will any 18" blade, with the right size hole (5/8" I think) fit my machine ?(commercial quality, of course) Does anybody have any good sources for blades (online, mail-order, etc)? Thanks in advance for the feedback!