Were there two versions of this PDF? I just came across references to variants of the Behemoth (Stone Rhino) that I wasn't familiar with- the 4, 5, and 6 variants. All the sources I can find say that the records sheets are in Record Sheets: 3055 Upgrade Unabridged. However, the copy of that PDF that I have does not list them- it only lists the original, 2, and 3 variants. The links to purchase this PDF that are on the Battletech web site point to the now defunct BattleCorps store, and DriveThru. The description at DriveThru matches the product I have (250+ record sheets), but not the description on Battletech's site (350+ record sheets). The product I have also matches the description at Sarna.net for product code BC-209. And the Catalyst store doesn't list the product at all.
Makes me wonder what other mech variants I don't have record sheets for now, and what products I need to buy (or rebuy) to get them. The PDF I have is 283 pages long, and the record sheets start on page 6. So it's not the PDF version of the print book, that includes scenarios and what-not.
Anyone have any clues?