I just noticed your post today, 01/18/16. Probably missed it because it was done on my 70th birthday, and I was otherwise occupied. I never messed with Bachmann's 45 tonner, but I'll bet if you post this query over in the Rolling Stock forum you should get a few good answers. I'm pretty sure that Kevin Strong has kitbashed that locomotive, and may have the information you are looking for. Half the challenge is determining which forum to post a query in.