Yes I just made my account but I've been lurking on here and the F10 post for about a year now. That aside, I didn't think anyone else would actually try taking apart the wheel to map the blank buttons to anything.
I'm in the process of mapping those two blanks to a siren I'm wiring into my F10. I was cheap so I actually turned the blanks into movable buttons with an Xacto blade and file (and some white lithium grease).
Then attempted to solder my wiring to the board and interrupt the board traces to prevent communication with the iDrive and other ECUs. Although a sneeze botched that up and here I am stumbling onto this thread looking for a replacement board
This is actually pretty cool, I'm interested in seeing more, as well as figuring out where that guy actually got his boards since I need a new one. heh