A Truck Tuner or similar tool works great on plastic sideframe trucks but is there an equivalent for die-cast metal sideframes such as the Walthers https://www.walthers.com/heavyweight-6-wheel-passenger-trucks-type-242a-1-pair ? Conical Dremel bits don't have the correct taper for this. I suppose I could chuck my Truck Tuner into an electric drill but using it on metal would probably dull it quickly making it useless for using on plastic trucks.

What would be the most common diesel locomotive that Union Pacific would have been using in the grain belt during the 1960s-1980s for operations? The SD40 was a latecomer, and -2s weren't out yet.  SD24s? GP9s? GP30s? GP35s? None of these?

I used the yearly listing in UtahRails.net and saw these as common acquisitions during the late '50s and '60s.

Any input would be appreciated.

Unfortunately, what I have now are post 1980s and covered wagons.  Go figure. (exceptions, an SD40 and GP38)

I just received in the mail a Broadway Ltd heavy pacific 4-6-2 locomotive in the Erie road name. For some reason I thought I had purchased a heavy mountain 4-8-2, one of my favorite C&O engines. I was all set to convert this Erie engine into a C&O engine. ....oops

So I did a quick search to see if C&O actually utilize many/any pacifics, and I found this site that indicated that C&O was very fond of these Pacific locos,..
https://www.american-rails.com/co-f.html

Just happened across this older posting on a MR forum. Wonder if any others have comments/observations  about these engines?
 

I have a brand new one that has never had a chance to stretch its legs yet.