01-25-2009, 03:10 PM
I would say it is entirely up to you. There are no "model railroad police" to come over to your house and dictate what you can or can't run. If you want to run the more modern stuff and it bothers YOU to see equipment from the mid 1980's-1990's on a layout that you know to be 1970's, it isn't that difficult to change the time frame. If you are modeling an old section of town that hasn't been renovated, updating from 1970 to 1990 is a matter of changing out some vehicles. Trying to model 1950's-1970's is a pretty big spread, going forward another 15-20 years should not be that big a deal.