Burning faster on RiData +R 8x media

I flashed to Liggys latest firmware 1.u9 to my NEC 3520. I noticed some posts mentioning that it’s possible to burn 12x or higher on this RiData +R 8x media. How does one do that? In nero 6.6.8, i can only set it to 8x max. I can’t set it higher than that.

8X is the MAX speed on this drive with any firmware at the moment.
Although revision 01 of this media has been speeded from 4X to 8X with modified firmware.