Here is my method:
1. First i modded the Burner Max Firmware for my 124b drive with Media Speed Edit :
MediaCodeSpeedEdit tool for DVD-Writers
to include 2.4x speed for the discs I'm using ( Ritek-S04-66)
2. Flashed the modded burner max firmware to the drive.
3. Restart PC
4. In ImgBurn, Changed the buffer size to max(512mb). Disable BurnProof. Force Hyper Tuning off. Online Hyper Tuning off. OPC off. and set burn speed to 2.4x.
Have burned six XGD3's so far with 100% verify on all. 100% install to hard drive too.