Replying to Question about 2011 line step ups

So i have a pair of the original stepups that have one mount plugged and the current mount pattern. the holes are so close to the plugged ones that im worried about the strength of the holes being used. I had snapped my shitty salomon bindings right where they screw down twice. So im wondering if it would be worth to try and get the heel pieces replaced again? or if anyone has similar experience with this problem?