Revert "Change the connections from instance methods to class methods. Now we don't have to initialize those things every time we open a connection"

I started getting some errors from the classes so I decided it was more trouble than it's worth. I've got more important stuff to write.

This reverts commit f5f9820897bb3a5c6f83dce4a302a00b00afdbf8.
Update isolation when an interface is destroyed