3500a can't burn verbatim DL's anymore

                        Media Information                            

Region information N/A not a DVD-VIDEO
Media code/Manufacturer ID MKM 001
Media Product Revision Number 00h
Format Capacity Blank Disc
Free Blocks 4007788544
Free Capacity 7.73GB(8.30GB)
Book Type DVD+R DL
Media Type DVD+R DL
Manufacturer Rated Speed 2.4x 3324KBps
Available Write Descriptor CLV 4.0x 5540KBps
Available Write Descriptor CLV 2.4x 3324KBps
Linear Density Blank Disc
Track Density Unknown
Number of Layers 1

                       Complete Media Code                           

00000000 01 02 00 00 E1 0F 32 10 00 03 00 00 00 FC FF FF …2…
00000010 00 22 D7 FF 00 00 00 4D 4B 4D 00 00 00 00 00 30 ."…MKM…0
00000020 30 31 00 40 25 25 37 0C 02 2F 63 02 2F 63 21 23 01.@%%7…/c./c!#
00000030 0D 0E 14 14 02 01 01 10 00 21 23 0D 0E 14 14 02 …!#…

I’m using Liggy and Dee’s 2.1b bitsetting rpc1 firmware. I’m getting power calibration errors in both imgburn and nero I once tried downgrading my firmware to an older version “Liggy’s 3500 bitsetting Firmware 2.R8” and the power calibration error didn’t occur but the verify failed in both programs.
Does anyone know of a firmware version that burns to this media cleanly? I would really appreciate any help as I have a spindle of 20 of these. I also appreciate this board and all it’s members who contribute. I’ve been a lurker here for years and was always able to find help here in the past but on this one i’m kinda stumped.

Is this media MIS or MII?

mis according to the spindle. I’m also assuming that they’ve been sitting on bestbuy’s shelf awhile and are probably an older media because they were cheaper and are only rated for 2.4x (up to 6x but…)

anyone know how to tell what the mfg date was on them aside from 2006 on the paper sleeve because that could just be a label redesign? I may be able to match up an older working firmware to the drive to get them to burn properly.
Or anyone else with any other insight, I would really appreciate it.

Try one of them to burn in another burner, and then scan the outcome.