The thing is that I originally aimed to try to basically succeed in building a button all on my own, so to speak, which was a bumpy ride with lots of different nodes and hacky code included, but it eventually worked out quite fine for me in terms of flexible animating etc. I only then, going on, stumbled over this seemingly unresolvabe problem of implementing these single buttons into a more complex context. Such a little thing to cause such a headache!
Now I guess you're right - I should see to use "on board" buttons as a base and then try to pimp them with my own designs... probably the best way to approach such elements.
Thanks for building that camparison example with "real" buttons to show me that things actually do what I want! Your help is much appreciated : )