I've started to model the 42125 set, and I have a problem with the front hood. This one is a 5-bar linkage, not so easy to create directly in LDCad. I created a Geogebra model that easily gives me a solution, but when I bring the values in the model the hood is placed very low and there is a collision between the hood and the chassis. I think I verified correctly all the assemblies, so I'm puzzled... That's probably a big, obvious mistake, but... 
Geogebra file: https://www.geogebra.org/calculator/jrbf4qav
Model in current state attached.
Geogebra file: https://www.geogebra.org/calculator/jrbf4qav
Model in current state attached.