Guys, I need a shredder more than a chipper so I'm thinking of getting rid of my jimna. What I'm interested in knowing is how well does this unit shred? I haul about 500 bags of leaves out to my place every year to mulch my fruit trees and I also chip some cedar also, so a chipping option is nice to have also. How about maintenance on the 70554. Is there much to keep tuned? Their site doen't give much info so any you give would be helpfull. Mark