That photo of the MRL gas train is greatness! I would like to find out more about those cars for sure.
James, is that model available in HO? Curious why it wouldn't be on their list....SP guys are usually well represented on freight car boards.
So there's two to add, and we should probably figure out which ones to remove. From a quick scan:
Atlas 2743
BLMA TopGon
Atlas NSC Coil Car*
Atlas BTTX Articulated Trilevel Thrall Autorack
Athearn/Intermountain* ARMN Cars
BLMA 53ft Trinity Spine Cars*
Athearn Maxi COFC-TOFC 3-unit
Kato Maxi-Stack IV
Walthers Thrall COFC/TOFC 48ft Single & 3-Unit
Now, it gets somewhat tricky in that there are very specific (manufacturer specific) cars, whereby a similar model may exist in N. So for example, the list includes the 53ft Trinity Spines, which happen to be the model BLMA is making. But if it had been another manufacturer of a 53ft spine, would that hold water? I say no, although the availability of a close substitute might move that down on the point scale as far as popularity.
Another example is the specific class of TopGon's...I didn't take the time to research, but I seem to recall that Craig and Robb both said they would be doing multiple classes so I would assume this would fall in there, if not already.
We may also face the prospect of applying foobies to the list. So what prototype is the 50ft LBF boxcar? Gunderson? The Exactrail is a Trinity, but do either of these equate to the 6269 highcube on the list? (I haven't really looked to see, just kinda using this as an example...they may not even be close)