Possibly,.... Maybe,.... Not a clue. But here is an idea to try, first of get the image of the wf made. Now here is two possibilities that I am just thinking of and that probably wont work.
1. Try addind the chrono animation to the wf that would be used as the tank appears (similar to the doors opening or the roof opening on the original).
2. If it has an arm like the service depo, then maybe if it swings up when the unit it made, it could have a chrono animation on it (similar to the repairing sparks of the original service depo).
Now remember, I have never messed with building animation, I know nothing on the subject, and these are just ideas. I have no clue how you would actually do these, or if they can even be done.