If you have or can get a copy of Kalmbachs "Model Railroader Cyclopedia - Volume 2, Diesels" in it you will find drawings of the SD40-2. You will also find drawings of a lot of other diesels.:D
Dan
What's gone is gone!:(
At least we can continue from here if I remember correctly we were at 'O'. Heres a couple of 'P' shots. This first one is of the Prescott & Northwestern at Prescott, Arkansas.
I have to agree with jdh. You can't go wrong using a MRC throttle! Granted there are more sophisticated throttles available but for your money MRC's are hard to beat.:D
Heres their site www.modelrectifier.com
Dan