I know it has been a long while, but I am very interested in purchasing this from you Just had one question, was the coding eventually cleaned up with 
AnD4D 's final code?
It was taking waaaay too long to clean up the code, so I started from scratch using an alternative method. Used hardly any code, relying on line of sight and 'lasers' to detect collision. Physics wise, it worked great, but I was never happy with the look of the 'rope'.
I've used chipmunk physics quite a bit in the past few months... and having collision detection that plugin allows would shave off even more code.
I'll have to look into that when I'm done with some other projects.