Hello guys,
I have a question about how to scale up a Dino like a Trike to the size of a Rex. I am new to all this moding stuff and its my first time to make one.
If someone can link me a Tutorial or maby can help me somehow that would be cool 
The basic way is to change the scale numbers inside the skeletal Mesh (NOT the BP). this should work just fine. If you are trying to scale up a non-ridable dino to make it rideable, then you have copy the skeleton and animations and retarget everything. like this: https://www.youtube.com/watch?v=rYCIOAHOXkI