I've got an L3800HST with a brushguard on the front. Great little tractoe with good power, however when running my Landpride 5' rotary cutter or my Farm King 7 foot finish mower she's "light" in the front end. How much weight do y'all figure I need up front to hold her down? (Rear tires are fluid filled already). I've got (someplace) three of the old JD suirtcase weights (42 lb?) that I'm going to try tomorrow. Think that will do it or will I need more and if so, how much? Big K is sure Proud of their weights. The dealer quoted $450!. Thanks for your help and suggestions!!