Originally Posted by
rosefarts
Seems like the two best options would be 1. Get an extra long expansion plug that's long enough to span the distance from a little below the top of the headset to just below the top of the stem. OR #2, use a small expander plug deeper than the top of the headset and fill the remaining space with epoxy/jb weld with the bolt in place to allow.
Seems to me it would be easier to epoxy a steel tube inside the top half of the steerer and be done with worrying about it. Then even if the carbon did fail it would have less chance of being catastrophic.