An opinion:
What's really needed on cars like these is what's called "kinematic close couplings"; these are couplings that have 'draft gear mechanisms' that sense the curvature, and increase the car to car distance accordingly -- on straight track the distance between diaphragms is minimal. These have been available in European HO [ because of the buffers ] for years; Kato [ who else ! ] is putting them on their recent HO and N Superliner / Daylight passenger cars; and they are usually on the "Lenz" coupling which predominates on European RTR 0 gauge equipment -- MTH Euro freight cars [ and the Rheingold cars ] w/ scale wheels have them.
For cars such as the CZ a dummy Tightlock is suggested; the CZ would have been an ideal set for these, since I believe it generally ran as a block over its route. Obviously pads for KD's would be an in-the-box option.
Best rgds, SZ
