Its finally happened. Thanks to the brilliant work of the DVRFlash team its now possible to crossflash your 215D to the 215. The files you will need are located here:
The above file contains DVRFlash 2.5, the kernel, and firmware for the 215. The firmware installed will be 1.18. The DVRFlash command to run is:
dvrflash.exe -ff D: S0014000.118 S0014001.118
Say yes to the warnings and the flashing will then proceed. After which you reboot and you will be at 215 with firmware 1.18 installed. Take note the command above assumes your drive is D so change as necessary. The kernel for the drive came from Pioneer Japan which supplied the kernel with this firmware. Thanks!
Now all that is left is to try a 212 > 215 crossflash...anyone have ideas on what hardware changed between the revisions of the drive?