Z scale Marklin tankcar with relocated truck wheelbase.
Wow. What a change! A completely different underframe?
Nope, the stirrups are the same.. The bolsters were moved...
OK. I can't see the stirrups well enough, in that bottom photo.
Here are the changes made to the under frame:
Right after I finished it Robert Ray made up all new laser cut replacement under frames. Here the Texaco car has his new frame:
Quite an improvement. Looks really good to me.