Repair update. I talked with Jim Pittsburgh yesterday morning before the Dow plunged another thousand points. (It was already down 2000.) He gave some useful advice about replacing the belt. I removed the belt from the DBX and, after picking up my supplies at the state store yesterday, I went to the Busy Beaver in Irwin and and found a similar size O ring. Got home and removed a gear on the player and installed the ring. Works like new. The D5 is now back in service!
Thanks again, Jim