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C3 if I am correct is the clearance advised for press-fit assembly in a metal parts, that way the clearance is reduced once assembled to a more acceptable value (e.g. in idlers with metal pulley).
If you managed to extract them with simple tool ("light" press-fit with hammer for example), I reckon the standard ones should be alright but @mdcc_tester will probably be more useful than me
Thanks. One bearing is missing and the other is fucked - hence changing them all.