I have seen different threads pertaining to using doubles. Would like to hear from those using doubles on scag Z-cat or similar? I tried doubles on my own personal yard (St. Augustine grass), However i really didnt see any difference accept for more blowout and sounding like a boeing 747 taking off. 95% of mowing is St. Augustine (Subdivisions) with the rest being Bahaia grass . What is the main pupose for doubles? Are you guys mainly using them for the yards that are cut bi-weekly or severly overgrown yards, fields, etc... I just dont see for everyday use the benefit. Can someone please educate me on this matter. Thanks.