I had some of the latest versions of the Cinelli allen bolt binders, and two of the center "nuts" easily cracked under moderate tightening, When I contacted the Cinelli distributor about them breaking, they confirmed the problem, but would not offer replacements, Trust me, I don't have a Gorilla grip when it comes to tightening bolts, so it wasn't my fault.
I say this because some of the alternatives offered by CR list members may be more durable --- can't vouch for them since I never owned one, but suspect they may be more durable than those currently produced by Cinelli,
For what it's worth,
Regards in powerless/heatless icestorm struck PA (perfect 47 degree indoor roller riding temp)
Kevin Kruger - Grantville, PA
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