ITB owners - 172/Megane vs Williams release bearing

[Evogone]

FAO ITB owners - What have you all used ?

Whats the difference between these release bearings, i have one for the 200mm Williams clutch and 215mm Megane clutch look both the same ?
Yet the diameter for the contact point on the clutch plate fingers is a larger diameter on the larger clutch (only just touches the tips of the fingers)

Any pics of a 172 release bearing ?

[Laine_16v]

Use 16v/Williams bearing.

[Evogone]

What if your using a 172 bearing ? that what mine has ? will it not work ? this is what was fitted to it for this engine and clutch.