scout24
Flashaholic
Vinh uses his own driver, a big copper heatsink, and several choices of emitter. Full custom, if you will. 10440 cell only, honkin' bright. There's a thread on them in his subforum in Custom Builders and Modders... 
… it turns out copper has a distinctive metal smell I'm not particularly fond of. … I have to hold my light in my mouth quite often.
But since there's a Ti version coming, I may try that...
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.... and I'd promised myself not to buy any new lights this year.