Thanks, Russ. Clearly there is more to know about the development of the Masterpiece configurations than I thought there was.
I have weighed my non-model-marked Masterpieces in the past, but possibly none of mine were made late enough to catch the heaviest variation you mentioned. I don't have any model-marked Masterpieces.
When I need to make as many additions and corrections to earlier comments as I have in the last couple of days, it's time for me to take a quiet pill and chill out. It's tough enough for people to understand something without having some guy shouting out information that is either a little off target or flat-out wrong.