well kernel bfs for my most part seems to work fine, i havent felt any conflict with kp 47 or 48. However mulitboot does behave slighty funny but its nothing to worry about;
just keep on selecting the boot option that you want with the keyboard open, the device may turn off but dont worry, then close the keyboard and power up it shud boot into the option you selected last...

also kernel bfs creates a flickering effect while scroll with opera, unlike power kernel. I shall test it some more and see what happens under heavy stress.