Help! 4x e3works DVD+RW shows up as 2.4x only

e3works DVD+RW disks Rated at 2.4X - 4X

My NEC 2500A with 1.07v2b5 Herrir firmware can only burn them at 2.4X, while my BenQ 822A and Toshiba SD-R5272 burn them at 4X without any problem.

DVDInfoPro
Media Information
Region information N/A not a DVD-VIDEO
Media code/Manufacturer ID OPTODISCOP4
Media Product Revision Number 01h
Free Blocks 405405696
Free Capacity 4.38GB(4.70GB)
Book Type DVD+RW
Media Type DVD+RW
Default DVD+RW book type DVD+RW
Default DVD+R book type DVD-ROM
Media Id Code Speed 4.0x 5540KBps
Available Write Descriptor CLV 2.4x 3324KBps
BG Format Status Not Formatted
Linear Density Blank Disc
Track Density Unknown
Number of Layers 1

00000000 01 02 00 00 92 0F 04 00 00 03 00 00 00 26 05 3F …&.?
00000010 00 00 00 00 00 00 01 4F 50 54 4F 44 49 53 43 4F …OPTODISCO
00000020 50 34 01 39 23 00 9C 7C 64 02 28 00 96 7E 74 02 P4.9#…|d.(…~t.
00000030 28 00 9C 7B 70 02 28 04 04 10 F0 00 F0 00 00 00 (…{p.(…

I flashed it with Herrie’s firmware 2.16 (2100@2500, riplock removed, RPC1, RITEK DL support, DL bitsetting!).
Now it can burn the 4X OPTODISC DVD+RW at 4X, but I lost the 8X burn speed for HP 4X DVD+R disks (Media code/Manufacturer ID CMC MAG F01).
Hope Herrie will combine these 2 firmware’s Write Descriptors.

BTW, I can not set booktype from DVDInfoPro, but I can see an option from Nero 6.3.1.20.

thats because it only has Dual LAYER bitsetting in 2.16