Hello Hans. For drawings it's me who made all the sketches, a friend helped me by giving me a certain number of dimensions. A contact at CAT gave me shemas frams front and back. I took a lot of pictures on real 966C.
It's true that CAT does not want to know anything about the modeler, I have a friend at a CAT dealer. CAT likes to send letters of law to those who make parts for models that help them. The engine that I used is a 3406 it's not this engine that there is in the real 966C but everything is possible in life and it is possible to place it in the fram of one. 966C. This engine is found in Revell Snap kits.
Wheels and tires are our creations my son and me. We sell them on our website: www.Papyhobby.com
I hope these answers satisfy you.