Wearing Irish Sweaters wtih Kilts, Belt or no belt?

[Macman]

I recall wearing our web belts over our wooly pullies, which were worn over the kilt, whilst in the army reserves. Because the sweater was quite tight to the body, the belt over top looked kind of cool. Now I wear sweaters, including my Aran sweater, over the kilt. Since the belt can't be seen, I consider it optional.