I have heard different reports if bitsetting works on this drive or not. Please post your bitsetting experiences with this drive in this thread. Please do not forget to mention your firmware version.
There are different firmware versions available. Has any1 tried the bitsetting tool with the Sony firmware?
If all 812s firmware versions do not support bitsetting, is any1 willing to test the 851s firmware GS0A / GS0C on his 812s and post the results? 851@812 seems to be possible => 812@851 will be possible as well.