My general rule of thumb is, If you can't find any one of their claims verified in real scientific or academic circles, then it isn't true no matter how blue in the face they are about demanding that people believe their lying "research".http://lronhubbard.org.za/wp-content/uploads/2015/06/tonescale-en.pdf
THE TONE SCALE list (showing 40.0 to -40.0) is on pages 10 and 11
IIRC, Hubbard claimed there are 2 tone levels: thetan, thetan+body.
Correct me if I am wrong. (HCOBs?)