get yourself an audioquest binding post wrench, so you can't over torque the binding posts.
http://www.amazon.com/gp/product/B0009XQUAM
since they are damaged get some cardas posts with the single knob to tighten down. sorry no experience replacing them
http://www.amazon.com/gp/product/B0009XQUAM
since they are damaged get some cardas posts with the single knob to tighten down. sorry no experience replacing them