This thread has been very interesting, as I see that amongst Highland men it's very common to wear an Evening jacket with no waistcoat, with a waistbelt only. I didn't realise how common that was, because the places selling Evening jackets always sell them with waistcoats.

Yes I know wearing a cummerbund with a kilt isn't in line with traditional Highland Dress, but my motive was to match in with the wedding as well as I could while kilted.