I need huge assembly to use for NX advanced assembly tutorials.

I am making some tutorials about managing huge assemblies in NX, and I can't find any really "heavy" assemblies which when loading with different option will make measurable difference in load time and drawing management time, so I can put time difference spreadsheets along with different methods.

Do you guys have some huge royalty free assemblies that I can use for making tutorials that I will put on my blog page, with credits given to assembly designers?