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No, literally just wormed it. Had two go's where it started to look impossible. Then somehow on the third go it just came loose about the final bend (the tight one between the tops and drops). Can't remember whether the slot was on the inside or the outside of the curve.
Did attempt to lever it open a bit with an Allen key which worked a bit if i were to get it stuck, but I didn't seem to use it for fitting it round the bend.
did you use some reverse pliers when you did yours?