Nice job! I don't like needles! 
LOL! Anyways an idea about the heart box thing! Okay just have it hooked up to the tubes and that's it, suspended by the tubes and just open! maybe some metal plates covering in places! Just an idea! Later
May the force be with you...always!
A Jedi shall not know anger nor hatred nor Love
The only way to live a good life is to act upon your emotions
A warrior is reborn when he has something to protect