Happy New Year,Steve.I just looked at my dismantled Plus brake plates and the grease nipple on the rear item measures 0.185inch(3/16th inch) so maybe BSF OR 2BA?Regarding the 'cam-operating shafts',both of my Plus items,front and rear,measure 0.562inch (9/16 inch),and my Mark ones are both 0.496 inch (half inch).Hope you are keeping well these days? Best wishes,Ken Playfoot.