Do what other said, use a blade and hammer it in between the carbon and crown race, this is one of the very rare instance that a simple method exceed those expensive tools as thpwe tools need to be in excellent condition to barely make a dent.
When you put a new one in, cut the crown race to split it and shove it in, this way you won’t need to cut it off again.
If the crown race use the same angle cartridge bearing as the new headset; leave it on.
It's not a crown race, Ed. It's a thin lower bearing race on a Campagnolo Chorus 11 spd UT crank. The rest of the bearing came off, leaving this on :-/
Edit - I've ordered the thin cheap looking one from Chainreaction for £15
Do what other said, use a blade and hammer it in between the carbon and crown race, this is one of the very rare instance that a simple method exceed those expensive tools as thpwe tools need to be in excellent condition to barely make a dent.
When you put a new one in, cut the crown race to split it and shove it in, this way you won’t need to cut it off again.
If the crown race use the same angle cartridge bearing as the new headset; leave it on.