Need new olives, might get away without bleeding it but worth having the stuff to hand in case it's needed.
Don't need new olives if you don't change the length.
Don't need new barbs if you don't change the lengths, crush olives work by squishing a bit to seal stuff, so you should change them for new squish, although things will generally work without doing so.
@Emyr started
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Need new olives, might get away without bleeding it but worth having the stuff to hand in case it's needed.