Looking for advice/recommendations on purchasing an appropriate size/type chipper that could produce relatively uniform 3/8" size bark pieces if I fed big pieces of conifer bark into it. I would expect to make approximately 20 cubic feet of bark once a year or so. Plus, if feasible, I'd like to be able to use the same machine to chop up about 20-30 wheelbarrowfuls of fallen alder leaves each season. I've never owned or for that matter have any experience with using a chipper/shredder of any kind. Any tips/comments to help me get on the right track and steer me toward an appropriate machine for what I've mentioned would be greatly appreciated.