Yeah, I tried that track myself. I got the usual framerates in the areas with nothin' (just grid) and ohh, maybe 3 FPS in areas with trees and buildings.
The stuff looks so nice though....
Why, it even looks better than my HOn3 micro-engineering flex track! Say, ya' know, I just had an idea.... you should do a full fire train! 3 or 4 water cars, a converted boxcar for a caboose (or tool car), just like this one: http://www.btsrr.com/bts8275.htm
Do you have a copy of Kramer Adams book Logging Railroads of the west? Theres some fire train photos on pages 106 and 110.
My newest motto: Narrow Mindedness: the utter fascination and all consuming love of all railroad equipment that is narrow gauge, I myself have an acute case of this disease, for which there is (fortunately) no cure