[RodKnock]

Another difference. From what I understand, the CSX alloy roller is about $120,000 and a well-optioned Kirkham roller is $57,000. The Kirkham roller is unpainted and comes in a rough file finish. The CSX alloy roller is painted.

Ernie is right. WAY too complicated and I doubt anyone here knows all, or even most, of the differences. Even the early CSX's and Kirkham's are completely different than their respective later brethren.