I quite agree that half a belt showing under the waistcoat is not a good look. I also am considering the buttons on each apron solution for braces that a couple of members suggested. I was hoping to see a couple more photos of folks wearing a belt over a waistcoat as I remember seeing a couple posted here before.

As I said, I am considering making a waistcoat, perhaps from moleskin or microsuede; so I was wondering if I might cut it shorter and straight at the hem to show the entire belt, perhaps with straps to keep it down around the top of the kilt. Any opinions on this look?