On of the big attractions at this year's Mill Creek Central RR, 2009 Logging meet was John Huizenga's 2.5" narrow gauge Heisler. Always ran like a champ and never missed a lick. That whistle was said to be heard 3 miles away. The only down side was that I never did hear it "bark" very hard, because it had way more power than tractive force. but, that's o.k. cause it was still very impressive.