That doubleheader back to the museum after the 1990 convention(1522 and 844) was one of the real bonus highlights for us. We had two cameras and got about 10-11 shots, and they both were working hard up the grade, and even did a couple of runbys around Webster Grove, MO.
As for the 1522, it needs its form 4 as stated, and has little prospects of operating anywhere, so like the 819, the future is not all that bright, nor is it anywhere really for mainline steam other than UP or CPR.
Greg
scroll down the link below and see the videos on the engines mentioned. Those days are sure history now, even the UP stuff is much different today. Glad I did this stuff when I did.
At least the NG soldiers on.