File the fork? Are you absolutely sure it's not just a very tight fit? I'd be persevering to use the ck headset in your shoes
I don't really want to damage a new fork or the CK headset which I could put on other bikes. Happy to use another headset if it's the right thing, not as bling obviously, but I've had good experiences with M:Part headsets before.
@yoshy started
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File the fork? Are you absolutely sure it's not just a very tight fit? I'd be persevering to use the ck headset in your shoes