First off, let me say thank you for the response. You don't need to correct in quotes "target disk" mode as it was widely and used to be known as firewire disk mode. I guess I have been using macs too long. I have heard that the migration assistant you suggested screws things up somehow. True/not true? Are you saying I can do a full clean install of Yosemite on the hack, get it up and good, then start migration assistant with it and my macbook pro on, and it will transfer everything without messing up stuff that makes the hack work? If so, great, that sets my mind at ease.
I am semi interested in cloud storage however I don't just want things "up to date" I want everthing from one to the next the same. A clone, or the actual device. My issue is if I have the computer off for 5 days and I turn it on to go use it, I would have to wait for it to upload/download all the tons of gigs over and over that have changed even if this were possible. I am talking the entire disk; preferences, apps, system files, etc. Perhaps what I want to do is not possible and I will just have to make something like cloud storage work. I do recall that new thing for Yosemite to go from one to the next, but I wonder if that is for all apps/documents/downloads/preferences/etc? I have not had the ability to try it and wonder if it works well with hacks. Anywho, enough on this, it has become more of a rabbit hole than anything, onto the reason I created this account.
There is no way for me to take offense, as I don't think you realize my suggestion. Perhaps you do, and perhaps my suggestion does not work, but the way you are clinging to the idea that you must have your 970 makes me think you don't. Hey, I get it, the 970 IS the best deal in a long time, and I don't want a 700 series either. I have waited over 6 months for the nvidia update and am still waiting for it to be a viable choice. My entire build hinges on the 970 card working. I am saying BUY a card that works to install the drivers. THEN, once the drivers work, swap that BOUGHT card out with your 970 and return the temp card. All it seems you need is for the driver to allow itself to install. And if NONE of the recommended hardware allows you to install the new drivers, then you have deeper problems than I am capable of solving at this time.
On a semi related note, can one run carbon copy clone on the hack and boot from that disk at all?