Hi, I'm the author of the "Sanity" patch for the GH2. I just uploaded the last version to my Google drive, if anybody is interested in using it.
https://drive.google.com/drive/folders/157bZ_DRA0FzA-7QUWG3lXwQmfoTEtXQl?usp=sharing
Here's a little background on why I developed it. When Vitaliy unlocked the GH2, there was a gold rush to create patches with very high bitrates. While the image quality looked great, those patches were terribly inefficient. I took it upon myself to create a patch that had the same top image quality, but at more "sane" bitrates. I can say with confidence that I succeeded, because I pixel peeped and compared the image frame by frame to the uncompressed output from the HDMI port. This way I had an absolute reference to shoot for.
That was a long time ago, and I have long since sold my GH2. If anybody actually uses "Sanity", I would love to hear about it, just for old time sake!