I give it a lash.

Forrester Modern 9yd kilt by JHiggins held up by matching suspenders (braces)
Forrester Modern tartan vest
Black Barathea Holyrood jacket with Fleur de Lis buttons
White minipleated front tuxedo shirt with wing collar
Black self tie bow tie
Silver skeleton pocket watch
Silver horse motif cufflinks
Silver cantle dress sporran in one of several different furs
Argyll hose matching the FM colorway
Ancient blue flashes
Patent leather wingtip/brogues (non-ghillies)

if outside in cool weather or in transit to event:
Black non-diced Balmoral with Forrester clan sterling silver cap badge
Black and grey heavyweight wool houndstooth Inverness overcoat

Midwest standard highland black tie wear for me.