Finally got to try out our new 580Z with the DFS on cleanups today and wow, I think I'm really gonna like this thing. I have one question though. We have always used pecos, so I'm not used to a spindle driven fan. Do these always take a while to spool up, or does it go away with break in. It has the Kaw 29dfi, so pleny of power, but only 2.2 hrs. on it. These are the same systems as Exmarks ultra vac, so feel free to advise.