http://cgi.ebay.com/Plastic-Injectio...QQcmdZViewItem
a small home plastic mold machine,
and use legos,
its all you need, serious.
the d-m-e jiffy shot is good with pellets, once you purge the nasty-smelly-probably costly blue junk out of it. I took some pics which I will be posting soon of the complete teardown of mine.