Still looking to find an owner's manual for my 1988 Asplundh Chipmunk 12" drum chipper. I have been told all Asplundh drum chippers were basically the same set up so any manual for an Asplundh drum chipper will be good enough. Specifically, need the proper method for setting up the knives, anvil (bed plate), and owner maintenance. Any help will be appreciated as this is my first commercial chipper. Thanks for any help you may offer, Tom