All UI elements (well, besides the OS X 10.10 icons) have been redrawn and restyled as accurately as possible.
With all UI elements drawn using vectors at 2x, everything will scale beautifully.
Download and use as you choose! All I ask is that you don't redistribute the kit, just point people here instead!
OS X Yosemite has been released so the UI is pretty much set but I will keep an eye on it and update as necessary.
Thank you to everyone who has downloaded the kit so far and for the feedback and donations received! <3