Recently, I purchased a fastrak, 20/52. with the mulch kit. I seem to have a problem with clumping when slowing down to make turns. Even with very dry conditions cutting less than 1-2" off the blades of grass, it seems to drop clumps at every turn or when coming to a stop. I am running the blades that came with it from the factory along with the mulch kit. The mower has about 20 hours on it now.