I find the advice offered to be excellent, and I'll take exception only to four words (emphasis added), and that merely because it overstates the thesis:

Quote Originally Posted by Tobus View Post
And like many here, I would also avoid tartan flashes, as they are not traditional at all and can seem a bit amateurish to some.
Matching tartan flashes have come around in vogue in the last few decades, from my intermittent observations of the scene. In that sense, we can say that they're "not traditional."

However if we rewind two or three centuries, garters might consist of any random strip of fabric that came to hand, to hold up the hose. This is the idea behind the soft "traditional" garter ties (and that they are easier on my legs' circulation than elastic garters). On that basis, the garter might well have been a scrap of the same fabric as the kilt, so we can say that the new-fangled tartan flashes hearken back to a very old idea.

Nonetheless, among guys of a certain age (e.g. mine), they may still be viewed as an innovation, for good or ill.

Tobus: I love those hose. If one can acquire hand knit hose of that quality, they may be worn anywhere.