O-120 minimum to run my new Key FT's are 60" radius.
Erik - Regarding your statement in the CZ coupling thread.
The FT's really hook up tight! Did the D&RGW FT's use drawbar or coupler between the A & B? I think it was a coupler, but I could be wrong.
The Santa Fe units have all couplers (as prototypical). Dummy couplers between the A and B, Kadees between the two B's. Coupling the A & B is a bear. Any ideas on how to ease the coupling experience?
That C&NW FT is another handsome unit.