SHW-165P6S and RICOHJPND01

I have been rather disappointed with my recent purchase of 25 Ricoh +dl printables.

The RICOHJPNDO1 dye is rated at 8x. Sadly I cannot get a successful burn at this speed on either my Plextor 760a or - more pertinently to this forum - my Liteon. At 4x I can get a working disk on the 165P6S, but the KProbe PI/PIF results are absolutely atrocious (see below). In all cases I am using IMGBurn 2.1.0.0.

Interestingly the scans look fine until around the 6GB mark. On those disks that failed the uncorrectable errors also occured at this point.

I wonder if anyone can suggest a solution, or have there own GOOD results to report with these blanks.