I think you would like the Top Deck
Just remember to swap out the flat bearing 
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Oops, I thought it said May ’17
You can click or tap the date at upper right to expand it.
This is not so! They are closer to a KK than a CT in shape. They softly center the string, like a KK.
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Does someone have a list of all the string nudging bearings?
CT
KK
V(Buddha whipple)
Double step/multi step(Pixel, 5-cut, DS)
Grooved(Crucial)
Wing(Terrapin) [if you count that]
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I have a whole topic about it. This is the topic that people hated so much on Reddit (when it was posted there) they harangued me until I left.
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I think I’ll create a bearing called “The Nudge”!
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Well I use nudge because apparently “centering” isn’t accurate. I’m not an expert though.
I know, but it’s great name. Hasn’t Frank’s patent expired by now, or no?
His patent has not expired.
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Is this complete? Anything else?
Does anyone know the year of the patent?
That’s all the centering types atm
I think a grooved flat bearing would be cool but nobody’s done it yet 
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This came up not long ago and it was listed as lapsed on the patent website, but then a few days later it showed as renewed.
“…urge the string towards the center”
String Urging Bearing
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Applied for in 2004. Granted in 2007. And extended to 2024.
2024 is 20 years from date of application if my calculations are correct …
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Crucial did grooved bearings many moons ago.