Since I started this post. I have been busy and really didn't have time for the layout. Recently I have been playing around with my Blunami locomotive. I found a setting for speaker size. The default was micro. I used a 2 inch speaker and since changing the settings to 2-4 inch speaker. Wow what different in sound. Fuller, richer and deeper. The non turbo 645 is outstanding.
These boards are pretty amazing.