I used clamps for a while, as they were installed when I acquired the bike, but eventually became irritated enough with them to leave them out. No problems after many miles. Also, balancing the wheel now requires only a few washers on the weight posts, rather than substantial lead weights.
I did plug the extra rim hole with a short bolt, after grinding the head down to a very thin and rounded shape.
I did plug the extra rim hole with a short bolt, after grinding the head down to a very thin and rounded shape.