Okay, I’ve just ordered a pack of 50, and I’ll see how they go in the 2500A. I’ll probably try one in my 811S, but I think it’ll turn out to be a bad burn. They won’t arrive till about Tuesday (Australian Eastern Standard Time), so be a few days before I can post scans, but rest assured, I’ll post some scans…
I hope they are as good as the RICOHJPN01 ones I’ve been getting, as almost every kprobe scan has been perfect. One or 2 dud ones for whatever reason, but most are perfecto 
That’s all I do with my 811S now, use it to Kprobe every DVD I burn, to make sure PI & P0 error are within my acceptable boundaries…
I don’t trust scans using any DVD-ROM or Combo drive. I’ve got the SOHC-5232K Combo Drive, and it’s Kprobe results are very different from my LDW-811S.
However, on a side note, the SOHC-5232K Combo Drive is the BEST reader I’ve ever had, very fast, and reads perfectly almost every damaged disc that I put into it…reads disks that my LDW-811S can’t even read.
If anyone in Australia is wondering where I’m getting these Ritek 8x DVD+R R03’s from, it’s from a seller in E-bay Australia, 25 of these for $50, or 50 for $100, plus $10 overnight courier delivery.