This is a bit off topic, but since you mentioned the NKP Berkshire I wanted to remind fellow forum members that the real thing - no. 765 - will soon arrive in Ohio's great Cuyahoga Valley National Park, one of the 10 most visited national parks.
It will run on the Cuyahoga Valley Scenic RR between Cleveland and Akron. It's always a great time to get up close and personal with the 765, but the scenery is worth the trip, too.
Here's a post I listed to the forum earlier in August. It has all the details.
Mike A.