TL4 differential bearing preload setting?

Hi, does anybody happen to know what the differential bearing preload should be set to? (TL4 Clio 197/200 gearbox)

I'm replacing the standard diff with a gripper diff, and fitting new bearings.

None of the renault literature I can find gives a bearing preload setting.

The closest I can find is guidance for a similar gearbox on another car, which specifies 10thou (0.25mm) - but that seems a lot to me.

Grateful for any help.

Thanks.