I have the TraceR – the latest version of a similar light. I’ve done the same as you and wrapped an extra elastic band around the light and bracket and so far it’s fine. I still have my Flare and the first saddle mount I bought which snapped on its second insertion. Is this what happened to yours – a cracked clamp?
Also, if you like the light, the TraceR seems to sit in the bracket a bit more securely than the Flare* as well as having a flange at the end where you have the o ring on the Flare. I’d recommend going for TraceR over the Flare even though you have the charging gear.
I’m tempted to throw my newly warrantied Flare your way but Sods Law says I’ll lose my TraceR if I do… 🙂
*I haven’t had the Verniers on it yet, though, so it could be imaginary.