OWC DIY Drive Upgrade/Install Kits for Apple iMac Models
How To Upgrade HDD on Old iMac 27 Inch 2010 Faster SSD Samsung SATA 2.5 - YouTube
Install SSD iMac 2011 - How-To DIY Guide Tutorial
My 12 y/o son is so excited. Found him a pristine Mid-2010 27" iMac for $100. Going to give it the SSD upgrade but he's stoked to start recording music with it :
iMac Mid-2010 27 inch (A1312) SSD and RAM disassembly and upgrade - Much FASTER! - YouTube