As I mentioned in my earlier post, try tipping your deck forward if possible and test that out. Also, my mower deck for my Gravely can accept a few different blade designs from the same manufacturer. What I am suggesting is that you may be able to put the same blades on your deck that are made for the side discharge model. The side discharge blades may have less 'lift' or different aerodynamics that will not keep the clippings suspended for so long. I did this very thing with a Honda mulching mower a few years ago. The mower clogged up all the time but left very fine clippings when it did manage to work. I switched to a regular blade made for their 'non-mulching' model. The resultant clippings were larger, but it did'nt clog up and leave large clumps. Whatever the size of the clippings, I just want them evenly dispersed.