FWIW, Just emailed Mr. Mathis at Butler labs, got a very prompt reply and he took the time to answer some questions for me. The analysis is 12.00 without TBN, add 10.00 for TBN, he advised that much could be gleaned from the info without the TBN test in most cases. I will try them, less money per UOA's means more UOA's !
GregH