Very interesting - my "backup" would get through 17+ CD's before failing.. then 2 CD's... now it fails before backing up a single CD.

Main System: 861v8, 808v6, 8000SE (l, r), 7200SE (c, rr, rl)
Living Room: 861v8, 7200SE (l, r), 5200SE (c, rr, lr)
Control:15 (2), MC200
Kitchen: G91A