Hello gents.!! I am having issues with various reach trucks in the same customer, issue started when customer decided to raise top shelf on racking to 295 inches ( 300 inches max height on this trucks) I was forced to clear all the height cutouts to allow operation at maximum height, I believe this is when the issues started having different units mast velocity fuse locking intermittently, error code 817 when secondary cylinder locks but free lift switch closes. I am open to all suggestions.... thanks in advance!!