Here's a question who's answer seems lost to time, I hope you can answer it.
I found a reference to this 'Mech variant in a 1996 publication of "Record Sheets Vol2: Medium 'Mechs". Today I purchased the PDF version of "Record Sheets: 3039 Unabridged" and found it listed as "CN9-YLW "Yen Lo Wang". I have had more than one BattleTech fan tell me that this is not a "proper variant", and that it refers to a specific customized 'Mech that has only one example in existence.
Is there any information you can give us about the Centurion CN9-YLW? Is it a variant of the Centurion in the same way as the CN9-A, CN9-AH, or CN9-AL? Is it legal for tournament play?