Interesting post, InducedDrag. So R44 is also pusher - my mistake. A crease in a Robinson tailboom generally causes the tailboom to require replacement, since it is a stressed skin. I imagine general duty TR loads would cause fatigue cracks from the stress raisers at the crease edges before compression buckling though.
Nice machine to fly (for a dumb engineer), just wish i had more cash to throw at gaining experience...
Mart