I've spent an inordinate amount of time in recent months wading through the murky waters of torsion free subframe design (specifically for an FG). One thing that keeps gnawing at me is the fact that there are a few examples on here of boxes that are rigidly mounted with u-bolts, yet have experienced zero problems after years of use off road. Furthermore, it occurs to me that the only cases I've read about where a frame actually failed was when some sort of torsion free type design was implemented. Forgive me for proposing such overlanding heresy, but isn't it at least possible that we're overthinking this subject? Can someone point me to a case where a standard u-bolt installation was used off road and eventually resulted in either a frame or box failure?