John,
Congratulations on being the first to run the 315. It is a very proud moment when you pull the throttle for the first time after so much hard work.
I do have a suggestion that the team may want to consider: If you will notice of Eureka, the branch lines are made of copper. The pipes used are schedule 8o, They work wonderfully, and I think add a lot to the appearance to the engine. The downside is that they are EXPENSIVE these days. However, they do not rust, and if you like they can be painted and no one will know they are not steel, except the guy that has to do maintenance. Just a thought.
Dan Markoff