Adding the third engine
Well after quite a bit of rattling my brain (or at least what is left of it), I have finally come up with a way of making project of adding a third engine and having it look like it was meant to be that way.
I started off with making the third engine. Now, as you can see, I have aligned the engine mount with the hole in the engine. That way everything will line up properly.
Engines underwent some detailing work.
I printed out another part #43. This will be inverted on top of the same piece, with the actual engine mount attached to it.
Here is the engine mount.
Engine mount attach to part 43.
Engine mount attached in place.