Dying PCjr drive; options?

As the subject implies, I've got a PCjr with a floppy drive that is having trouble reading disks and fails the internal CTRL-ALT-INS diagnostics. Symptoms include a very loud/bad noise at first seek (rest of seeks sound ok), and a "B" ("have drive serviced") result of the diags. The diskette I used for diags was tested in a 5150 and found to be good. This drive was working a week ago but has declined steadily until it can't successfully boot the machine. (I bought some time by formatting disks 8 sectors per track instead of 9, but that no longers works :-) I've already cleaned it using a cleaning diskette and alcohol. What are my options? Is the floppy drive in a PCjr as goofy/proprietary as the rest of the machine? If so, should I even attempt to repair it? By the bad clunk/buzz noise, I am assuming the head is slamming into the side of the drive or something equally heinous. Another related question: When I was first getting started with personal computers 25 years ago, I seem to recall that track alignment was a common problem and could be fixed by using a calibration diskette and special software that you could monitor as you turned the alignment screw. Without one of those factory calibration diskettes, is it even possible to align/calibrate a floppy drive for track alignment? -- Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/ Want to help an ambitious games project? http://www.mobygames.com/ Or check out some trippy MindCandy at http://www.mindcandydvd.com/