forgive me this may be a dumb question....I have a 2004 DC 25hp 50" cut.... I am having to double cut alot of yards.....I just got thru with a yard and I had to double cut most of it....I just had the rpms turned up (3810 no load) blades were sharpened yesterday....I am presently running the Oregon wide standard lift blades.... my first pass usually leaves stringers...we are having alot of rain lately so the grass is pretty lush.... would hi lifts help this ????? I asked my dealer and he wasn't that informative..... were can I buy some at a reasonable price?????