Comments about Cables To Go Centronics 50 F/F Gender Changer (Coupler):
Unless you are using a Centronics 50-pin to hookup external SCSI devices you probably won't need this. If you are actually doing this though you will need this. It's amazing that they still carry parts like this at Cablestogo.com and I was happy to be able to get it for cheap.
very quick shipment!