I know that LarryDFW has done a build with a 6x and a rayfoss driver, I'll see if I can find it
Edit:
here it is: http://laserpointerforums.com/f38/new-6x-continuous-duty-br-build-43433.html#post573157
read a few posts down, he says he's using the rayfoss boost driver.
I've owned about 5 of...