I've been doing triathlons since the early 1980s. I've never seen that particular attachment. It almost looks like a DIY contraption. It just seems kind of clunky and inconvenient. I'm trying to imagine my thumb reaching down to that lever to shift...or even reach to pull it back. And how in the world does the bar tape hold it in position tight enough to push/pull on the shift lever? It just looks like that isn't where it is actually meant to be mounted.I'd rather have the shifter on the down tube than that setup. Dan