well, i have noticed a couple things (i may have been a fanboy of the show as a kid xD)
a couple of the engines whistles (namely Gordon and Spencer, i think) are using the wrong whistle. also, ive noticed that Emily's model seems a bit short sometimes? and all the trains seem to have the same speed, power, etc stats, i think it would be cool if they had respective stats to the show. and of course, would love more engines, the mod might seem a bit silly, but honestly i like it for what it is! thanks for the response, hope to see more on this mod in the future! :D