I just thought of something. Are these the long drawbars that attach to the loco behind the rear drivers? Or are they the short drawbars that attach to a brace at the rear of the loco cab?
The short ones are terrible, in my opinion. Since they mount/pivot some distance from the wheel base, they have a cantilever effect and cause the tender to speed up when going into a high speed turn, just like the whip effect of a line of ice skaters.
If both of your locos have the short drawbars, then I could be convinced to redesign them. That's what Gilbert did. Most of the short drawbars are on the very early locos, except for Hudsons and Northerns.
