I'M NEW TO THIS FORUM SO PLEASE BEAR WITH ME. I JUST UNCOVERED IN MY DADS ATTIC A CONTAINER OF 9 GG1 HO  O SERIES ENGINES THAT HAVE BEEN WRAPED UP. THESE ENGINES DATE BACK TO THE 1980'S NEVER HAVE BEEN USED. THE STRANGE THING IS THERE ALL MISSING FRONT AND BACK COUPLERS WHY MY FATHER REMOVED THEM I DON'T KNOWN.IS THERE A VIDEO ON THE  NET THAT SHOWS IN DETAIL ON HOW TO REINSTALL THEM AND WHAT TYPE WOULD I NEED FOR THESE ENGINES.THEY ALL HAVE THE PPR LOGOS ON THEM AND VARIOUS COLOR SCHEMES. MY UNCLE WORKED FOR THE PPR FOR 35 YEARS ALL THRU THE 1940;S 502'S 60'S AS A MASTER BOILER WELDER AND USE TO TAKE ME DOWN TO THE YARDS AND RIDE THE GG1 AS A KID. OR IS THERE A DETAIL DRAWING ON HOW TO DO THIS. ANY HELP WOULD BE APPRECIATED.