Well, a bit ago I was recommended by a fellow TB member to have DCC installed in my Alcos by his friend Brad whom is a wizard with DCC installations. Here’s his blogpost about installing DCC into a C424, my units #305 and #302 were the first units with CN GP decoders he’s done.
http://n-scale-dcc.blogspot.com/2014/06/tcs-cn-gp-in-life-like-c424.html#comment-form