Can you post an FOTO with marked places where you changed the OpAmp's ? For both AD 8066s  and  8 x OPA627 options.

iFlash works, all other CF -> ZIF Adapters should work but not all will. Best to buy ones tested with iPod.

DigitalFreak   Here are the links for two different 160GB HDD for iPod 6G  http://www.aliexpress.com/item/Free-Shipping-New-1-8-HDD-CE-160GB-Hard-Disk-Drive-MK1626GCB-for-Ipod-Classic-6th/567277159.html...

If you want you can also try a straight SD to ZIF adapter. http://www.aliexpress.com/item/SD-SDHC-Secure-Digital-MMC-Card-to-CE-ZIF-IDE-1-8-50P-Converter-Adapter-Free/472448791.html   Or if you will use CF to SD adapter I may suggest a DELOCK - 61796 That in spec can take up to 2TB...

PRO 80 - Decisively have a build few shelves higher then the price and the sound even some more. My new on the move cans, and in case they broke i will just buy another pair but the case stays for other phones so their are my private new BLOCKBUSTER