I have a Gravely 144z I just put the mulching kit back on. (excellent fast mounting way of doing it, btw, just 3 pieces with bolts already attached to baffles). Anyway, just like I experienced in a test late last year, the unit mulches grass cleanly but just does not seem to suck up leaves as well as my Exmark units. Even the little 32" toro (exmark deck) does a better job. My lazer sucks up sticks even. Anything not dry and sitting on top of the turf is likely to get missed by the Gravely. Is there a combination of mulch/high lift /gator type blades to double up and use to get more suction or is it just an airflow problem due to the deck design? Or would it actually hurt by putting the bottom cutting blades even lower in the deck and raising the outter deck edges relative to the blades, losing losing lift due to the lack of a seal there against the grass? Unfortunately I'm out of uncut turf to test it on and my own lawn was seeded and I can't play around with it.