Hi @curator23,
can you elaborate the problems you had and what results you would expect for this type of simulation? I have a slight idea of what you want to do but I am not completely sure 
First thing that came into my mind was the Fictitious Clearance option where you can artificially close or open a gap depending on the value you give it (explained by @rszoeke in this post: Fictitious Clearance)
The problem I have is finding the right model since you have 9 models or so.
Hope I can help you there!
Cheers!