I should have just looked up! I have a couple of dummy engines apart for two rail conversions.
I'm looking at the post about OMI's details and realized that the MTH version has good detailing representing the air, plumbing and electrical lines on their engine too. I just need to remind myself of the value.
I truly like the quality of OMI's products. I can tell the crispness of the well built shells. I just have to stay within my means.
Mine run much better than the old days of mass produced under designed stuff in the old three rail versions.