What is the best tool or plugin for assеmbly of mold parts?

Hi to everyone!
I wonder if there are some tools in Rhino designed especially for development of molds?
I mean some specific tools to create assembly with customizable and automatically made clearance of its parts?
Of course i can make clearance manually, but when there are hundreds of parts, it becomes a bit difficult to do…:slight_smile:

Maybe there’s a beautiful plug-in for that task?

Can anyone give me a piece of advice, please?