Good info, Mark. Thanks for posting. I had not noticed the new MTH GN F7’s were freight units.
Another difference between GN freight and passenger F units was that the passenger F’s were fitted after delivery with General Steel Casting snowplow pilots. No O gauge manufacturer has gotten this detail correct until the most recent Lionel F3’s. “Standard” freight pilots are correct for GN freight F7’s, as illustrated in the Fogg painting above.