Now I am really wondering if 161 will really achieve 100% WEG
fleet after 9325E and 9329U retire.
Have expected 9508U 9541Y 9662G to stay put on 161 despite
any upgrade to WAB. Never expect these 3 to be eliminated from
161 as well even before the B1 VO3x retire.
I got the feeling that not all the 37xx are perm 161,
only 5-6 of them maybe yes.