I do use a kilt pin, as for me is the perfect final touch for a trad. kilt. ONLY used on the front apron, to allow the kilt to open when u seat, or maybe you can provoke a disaster on the fabric! Regarding the weight, well, as you said, they're not too big or heavy, but they just add a slight extra weight to keep the apron down. There are others heavier, but I never felt the necessity of having my "privacy" secured by a kilt pin. If wind makes ur apron look for ur nose, then no kilt pin will help to avoid it!

¡Salud!

T O N O