I decided that the engine bays need more “stuff”. The original ILM models used tanks from an Aurora Seaview submarine. That kit is long out of production, very expensive these days and won’t fit this kit. So, how do you solve this? You just scratch build them out of sprue and evergreen styrene.
This is the end result:

Scratch built tank in engine bay.
And from another angle:

Looking forward at tank
I think it turned out well. I just have three more to make.