It's interesting to me because:
1. I would have thought that having the forstay and shrounds connected to the same point and the rig tightened up to suit the weather, with a hinged mast step you couldn't get any significant mast movement, certainly not flex - unless I've missed something.. which is possible, SD..
2. I've been told that the majority of mast failures with my rig set-up occur at the spreader/mast connection - not at the shroud/mast connection. This could(?) only come with side-ways flex which I would not have thought you'd get under jib alone.