I’m sorry to disagree with you here, my friend; I would be totally for this clip if the TS10 had another place to affix it near the head, but as it doesn’t, a double-sided two-way clip is for me absolutely essential so it can be used as a hat light.
My use case for this is when I have to go out at night when it’s raining or even drizzling: I have to wear a hat or water gets on my glasses and I can’t see anything.
My TS10 clipped to the visor of a baseball hat is the perfect solution, no water gets on my glasses and the TS10 illuminates what’s in front of me entirely satisfactorily, but it needs a double-sided two-way clip for that; the one you’re suggesting would be disastrous for my use case.