Nice, Mike -
Thank you for posting. Did you bump into my fellow curmudgeon 'Uncle Al' Phillips while you were in Chattanooga? I was privileged to spend a couple of days with him at the TVRM a few years ago — there are some photos of 4501's rebuild and the TVRM yard at [
ngdiscussion.net], and close-ups of #630's Southern valve gear on the following post at [
ngdiscussion.net].
I stared at that valve gear for a long time, and never did quite figure out how it works. Years ago I had some valve-gear animations from Charlie Dockstader (sp?), including Southern and Young, but they were for an ancient version of Win-doze on a slow computer, and won't even load – much less run – on my current machine.
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Roosso