Bren, I don't carry a knife there normally, but it was more convenient in the situation. My pleats look so rough because I was rained on and sitting in them. It acted like ironing them spread. I was told to press them wile the pleats are parallel and it should solve the problem.
Tripleblessed, it worked fairly well. It is a bit more like wearing one when not kilted. It keeps it accessible yet out of the way.
I didn't notice it putting any stress on anything, but though it's beefy it isn't overly heavy. I wouldn't try a broad sword or axe there. I think I'm just more comfortable with it there because it is very near where I carry my utility dagger when reenacting.
Keep your rings charged, pleats in the back, and stay geeky!
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