No, I haven't. In fact I haven't ridden my bicycle in a couple years now. I'm building boats and concentrating on other pursuits.

The problem with an "ultralight" pannier design is fragility. Ultralight backpackers have these super light, almost sailboat-like fabrics that aren't durable. Since a hiker will only travel at two miles per hour or so, fragility is not a concern. Averaging 10, 12 or 15 mph, even one fall and your pack will be torn asunder, spilling all your gear across the streets and highways.

So, it's best to build panniers out of strong canvas, leather, packcloth, heavy nylon or other "bombshell-like" fabric. It's easier to save weight on the amount and type of gear, loose 30 lbs of fat, or buying a lighter frame is a more effective way to lighten your load.