It's the same kind of scenario where, I used to go into shops for repairs on their Car lifts, bushings gone, Equalizing cables snapped, Composite sliders gone, metal to metal. When all they had to do is spray some grease on the moving parts a couple times a year, oh no, not even auto mechanics can tell there is some binding and lubrication might be needed.

I would say, I'm more aware of scsi voodoo now, back when I first got your machine / cdrom ( last year ), Previously I never had to do much with SCSI before that. ITs hard to identify issues when your not used to messing with external scsi devices with no built in termination