There is no magic. With lift and vacuum, there will be dust (if its dry).

You do have a discharge port open yeah? (A closed mulching deck will have less lift).

Yeah its open. I cut all my accounts in 3.5"-4", I have noticed on my yard (3") that it seems to have more lift. My blades set about an 1/8" above the bottom of the front of the deck. If my blades were up higher in the deck would that create more lift?

Take all spacers out get the blade farther up in the deck
That's how I get it on my DC I use a rolled lift blade its a blade falls in between med lift and high lift

Well I have always thought that the higher the blade was in the deck the more lift but was listening to some folks talk down at the dealer and they were saying the opposite. The Diablo doesnt have any spacers between the blades and spindles so that is not an option for me. My standard blades have a 1' sail and the highlifts have a 1.5' sail. I am going to call around and see if anyone has a set in stock with a 1 1/4' sail and see what happens. Thanks for the info,

Just go with the high lifts. It won't be that much more dust really, but there will def be more lift. Most decks start losing suction after you get to 3.25"- 3.5". Sure, they still cut, but not as cleanly as when they are set at 3" or less. Mine is no different- even with high lifts. I cut at 3.5" because over that the quality of the cut really falls away.

Just go with the high lifts. It won't be that much more dust really, but there will def be more lift. Most decks start losing suction after you get to 3.25"- 3.5". Sure, they still cut, but not as cleanly as when they are set at 3" or less. Mine is no different- even with high lifts. I cut at 3.5" because over that the quality of the cut really falls away.

Ridin its really not the dust that bothers me as much as the extra fuel consumption. Over the course of a mowing season that's alot of extra dollars. I been studying on my current deck and may try a few mods on it this winter. While I'm no fabricator I have a friend that can build just about anything. I wish there was a clear cut , hands down best deck out there but it's like everything else, depends on who you ask,