Leaves are really starting to fall here and one of my mowers is a lazer Z HP 52 with the trivantage deck. The mower also has a ultra vac. The blowout is just minor in the front but excessive on the discharge side. I have run other mowers with vac systems and never have had a problem like this. Things that I have tried to correct the problem. Bought blowout baffle, tried notched foil, solid foil , and gator blades. Screen on the back of the of the hopper on ultra vac is completely clean. Pivot arm is greased. RPM's are where they should be. I actually run it at half throttle when doing leaves just to cut down on the blowout but only helps a little. So where do I go from here? This mower has been this way the last 5 years I have had it. Just can't find a fix for the problem. Anything ideas would be appreciated. Thanks.