Whilst it is an interesting undertaking, I think that reducing the size of eggs to the size of the model would make them too inconspicuous and easy too hide.
While you bring up balance, I don't see where this factors in significantly.
Telenodes have a section that is visible but does not take damage.
I think it has been over a year since I have seen someone shoot the webbing of an egg instead of the base, so it's not THAT hard to figure out.
By no means am I saying "Stop, and give up", I'm just trying to give some polite criticism.
If you think this is a project worth undertaking, by all means, do so.
Please continue learning how to model though, many community concepts are finished with the exception of modeling.
The open source community could always use more modelers.