Hey guys,
$15 is not a lot to lose, and the Chinese sellers seem to fall over themselves to keep their customers happy and keep their 5-star ratings..
I've done 2 of these with the CDM12.4, and both were AOK. I would have no qualms about ordering more.
There's not a lot of guesswork here - if the laser assembly which you've got matches the picture I posted, then that's what you order. Serial numbers are not required to order these.
Of course, the owner has to be tech-minded to be able to replace only the laser, and it is precisely these owners at whom the laser-only is aimed.
At this age, there'd have to be a serious problem if the PCB or motor needed replacement - I seriously doubt whether these are generally failing at this time. Another 15 years - Maybe.
Menahem