heres a link on how to do it.
http://www.edersbow.com/publication/1998/December/mount/default.cfm
I however use a gas powered pressure washer that I own with a rotary tip that doubles the cleaning pressure. I blow all the brain out with it and blow all the nasal stuff out with it, as well as leaving it spotless of cartlidge or meat, then I put it back in the solution for the whitening. I have done countess of these and they come out professional looking. I even have dental picks to clean the teeth.