Carl I think your figure of the Piper is super. I would'nt worry about the ribbons being in tartan, as you know the Scots are a very proud people and would show off their regimental colours whereever they could. In WW1 and most wars the bag would be inside a khaki bag rather than a tartan one but often tartan would show on the ribbon. Remember a sniper would not shoot a piper, (unless he didnt like the music) certainly not easy if he can just see a flash of tartan on a drone.
A good plinth with a Gordon capbadge would set it off nicely, can we see the mounted figure once finished.
Fallingbostel, that has a fine old Highland name to it!
Don