IS THERE AN INDUSTRY STANDARD FOR MARKING WOOD SHAFTS SPINE FROM THE FACTORIES? I HAVE SOME THAT ARE 70-75 MARKED GREEN ON THE ENDS AND I HAVE SOME THAT ARE ?80-85 OR 85-90 OR 90-95 OR 95-100? MARKED RED ON THE END. I HAVE HAD SOME 70-75 BEFORE AND THEY ALSO WERE MARKED GREEN. IS THERE A STANDARD COLOR CODE FROM THE DISTRIBUTORS THAT THEY USE SO THAT WHEN THEY LOOK IN THERE RACKS THEY CAN I.D. THE SPINE IMMEDIATLEY. SORTA LIKE THEY DO DOWELS AT THE HARDWARE STORES?