I just finished my wife's mother's day present and have noticed that the spacing on the Campy Centaur cassette is a bit odd. It shifts into all the cogs, but skips a bit in the 4 and 5 cogs.



It is a little hard to see in the picture, but the spacer between the 4th and 5th gear is noticeably narrower. The space between all the other gears are uniform. When the chain is in either gear, it rubs on the teeth of the other. It also skips annoyingly.

I bought this cassette from pbk a while ago so probably won't be able to exchange it. Plus I would rather not have my wife go without for the time it takes for it to get all the way to pbk and for them to sed a new one.

Is there anywhere where I can get just the spacers? I tried loosescrews and couldn't find anything.
Or better yet, does anyone have a trashed Campy 10 speed cassette that I could buy the spacers from?

Or did I put the spacers on incorrectly? Maybe in the wrong order? FWIW I just pulled the whole cassette, spacers and all, off the plastic holder in the box and just put the whole thing on the hub.

Any other ideas?

THANKS!