Disassembling Dead Hard Drives

Being in my company's storage-admin group (among others) means I end up with plenty of dead hard drives to play with -- so I've been disassembling them.  It turns out the faster/better/iops-i-er ones have more physical platters in them.  A cheap SATA drive will often have just one, where the SAS and FC ones have five, or in some cases three.

I wanna make the loose platters into an art project.  I used to have a clock I made from an old 7" platter.  If I can figure out how to hack up the heads with a jig-saw, they'd make excellent clock hands.