i’ve only unscrewed my Umbra twice when i had to, but the second time it squeaked really loud. i had this happen to my first N12, then it stripped a week later. any suggestions on how to fix this?
and it introduced a noticeable amount of string vibe, not fingernail vibe though.
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The squeaking is from the bearing seat being a bit tight. Just close it carefully and slowly and it should be fine. I’ve opened/closed my Umbras pretty frequently and haven’t had any of them strip, though a couple of them do squeak.
If you’re picking out knots I’d recommend a wooden toothpick or something similar. Saves time vs. unscrewing.
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PLEASE tell us when you get this problem worked out…it’s a sad situation.
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i will. 
Also, while you’re screwing it together, you can watch the gap to see whether it’s closing all the way. If it’s not closed 100% that can definitely cause vibe. Let me know how it turns out!
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i will! it didn’t cause any fingernail vibe, but it did introduce string vibe.
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That’s odd. I usually notice fingernail vibe before vibe on the string.
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Try fully pressing the bearing on to the bearing seat before screwing it together.
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I agree with this.
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Did you resolve this problem?
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not yet, but Mark’s sending some bearings that fit the Umbra a little looser.
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got the bearings from @MarkD, and the vibe and squeaking is gone!
@MarkD
@ChrisFrancz
@Travelingyoyokid
@jhb8426
@Benmichael86
thank you all for the advice! 
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I got a bad knot in my Topyo Mojo several months ago and took it apart very carefully. When I put it back together very carefully I got a very noticeable vibe. Does not effect the way it plays at all except for the very significant pulsing vibe. I switched axles and bearings and can not find or see any problems at all. I did not want to say this until you had your problem resolved because it may have made you lose hope with your brand new yoyo. I am glad you got it working it again!
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that’s nice of you! but if the yoyo did fail, without me really beating it up, and it coming to me like that, i would have talked to Mark about replacing it.
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I know you have already resolved this issue, but I’d like to offer a little advise.
I like to lubricate tighter bearing seats (aka “tapers”). Especially ones that squeak, or feel especially snug. No need to go crazy excessive with it, just enough to coat the surface.
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thanks bro, i will look into that.
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Any bearing lube should do, I was just pointing out that OD’s v4m says on the container that it can be used for posts too. That’s where I got the idea.
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good to know, thanks.