This is one of the best purchases I ever made, I've had mine from new.
The same drive works on *any* Mac, have installed A/UX from it.
It got me out of trouble with RS/6000, HP-9000, SparcStations, SGI Indy etc.
Mine came with the pair of AppleDesign Powered Speakers which are better than anything else I've seen (or heard) since.
I was so impressed that I bought a job lot of 6 of the mechanisms and have installed them into my 7043-260, HP 725/100, PowerPC 6100 and IIvx.