I have 3 of them and I have turned one of them into a close match of Engine #7 FRISCO had. It is a coal burning Locomotive. It looks really good. I added the FRISCO Headlight Bracket and Headlight with Visor, painted the white walls Steam Power Black and slightly weathered it after pics found on this sight. It looks really good and runs well too.
The light USRA 2-10-2 has 57" drivers and a wheel base closely matching the Frisco spot engines. As stated previously they run beautifully. The link below is one source for the Bachmann engines. http://www.modeltrainstuff.com/category_s/1728.htm MB Klein 243A Cockeysville Road Cockeysville, MD 21030 (410)-229-9995 John Sanders Springfield MO
I agree that my 2-10-2 runs and sounds great with the Tsunami decoder installed. Right now I have a 21 car train behind it, and it is not struggling at all to pull it. It starts off so smoothly and at such a low speed that I am amazed and happy I spent the money on the Tsunami. I am having the Tsunamis installed as I can afford to in most of my engines. Those I don't think are worth the expense, I will probably give to my grandson, although he may not want them after experiencing the decoder equipped engines at my house. Tery