If memory serves, which is not always the case, the new tender cistern was behind the 487 for quite some time. the coal bunker is not squared off but looks like the other K-36 tenders. I was told the rivets were welded on instead of true rivets but you would never know it to look at it. The 463's new cistern was riveted. All the new tender cisterns are beautiful, can't wait to see the 168's in person.
All you have to really do is cast the rivet heads in resin and glue them on! This was done on one of the coaches for a movie once. I think it was Wyatt Earp. used to find the resin rivet heads when I was "napping" under cars during work sessions in the Chama yard. I think there is still a dozen or so in one of my "Chama boxes". Still don't know why it always seemed to be the fat guy who got shoved under the cars to work on something. Its amazing what you miss. Ready to go back and work again.