HI Dave, Well, I know it's my fault for living "in the boonies" where we have no cell phone coverage, nor cable, so I'm stuck with 33K dial-up; it took me about 20 minutes to view your site--at least I could view it, many I cannot--like Facebook.
I may have misunderstood your description of the 360/470 comparison pics, I thought your description was saying that just the KC coupler on the frame was wrong.
I'm surprised at the high flange on the wheels you show, as usually the black-chassis wheels are the early nearly scale flanged wheels. I wish my stuff wasn't buried in boxes in storage so I could give you pics to post. I consider the wheels between the scale flange and the tall flange of late production as "mid-flange" wheels--I haven't seen this documented much elsewhere, so I developed my own "name" for them; I suppose they could be called "Type I, Type II and Type III."
I would even suspect that "back in the day" repair stations may have replaced the very low flanged wheels with the "mid-flanged" wheels when customers complained of derailments, though I've never heard of this being documented, like the pinned drivers of the '46/'47 production steamers.
It's fun to try to figure out the changes in production as ACG tweaked the designs. I have one diesel brush holder that is molded plastic instead of the stacked fiber pieces. I would imagine these failed when the motors got hot.
The Pull-More wheels are the primary reason ACG added the sliders to the diesel sideframes; they needed at least two pickup points to be able to run through switches and crossovers. Two pickup points also provided more reliability and fewer reverse unit accidental activations.
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