I have somehow managed to snap the stopper/security plate on my cranks. Doubtless an installation error, but it went mid-commute this morning on a filthy path so I haven't been able to look too closely.
My crankset is a Deore FC-M590 9 speed triple (I know, old school right?) but all I seem to be able to find as a spare online is a plate marked for the LX FC-M580. (here) I'm guessing this is a case of the part being the same/interchangable but wondered if anyone can confirm either way?