many thanks for the replies, helped in jogging the little grey cells into action, 2nd photo gives me an idea, a single stud into a bonded plate that has a centered 20mm dia shoulder. The badge would then self centre into the 20mm hole in the front clam that would be the cable access if I decide to go with a front lamp pod at some stage in the future, but still sit flush with the external surface of the front clam.