This issue is a hot topic on the Facebook pages:
https://m.facebook.com/groups/X3X4M/...ibextid=9R9pXO
That additional bushing(?) seems to be a solid component to help alleviate the bending/shearing. There was also a stronger bolt developed that is for sale, but I don't have the time to dig through the posts for it at the moment. They're currently testing it on a 1000hp setup.
Kinda sad we (the X3/4M community) have to develop and fix these issues, but I suppose it's better than shelling out big bucks to fix expensive stuff that could break.