Call me crazy, but I think that would look darn sharp, sans the tartan flashes. Personally, I just can't stand tartan flashes....

Are we talking a fly plaid or mini-fly plaid??

A nice coordinated sock with coordinated flashes I think would fit the bill...

A combination of modern/traditional.... You know, if you are comfortable in what you are wearing, and you think you look good, then you feel good....

I am no expert, but since the leather kilt is 'non-traditional', wouldn't traditional dress 'rules' no longer apply??