Hi, For Marty F and Alex - I have a printout from 'Nostalgic Air' for the Zenith 7H920 I am bringing to the clinic. It is 5 pages from Riders Volume 20-Zenith 20-43. Title, Schematic, Alignment Procedure, Tube and Trimmer Location, and Parts List are included. I will also bring it on a Lexar JunpDrive. Jim C