Harley Benton HBJ-26

After 14 years of ownership of this 6 string guitar/banjo my long term appraisal is that while the guitar has served me well but Harley Benton don't supply it with any sort of owners manual with service information ie string heights , head tension settings , tail piece settings , neck adjustments etc . I managed to buy two books on banjo setting up and maintenance in America but they don't cover six string banjos or banjos with a neck adjustment set up like the Harley Benton .