Marco,
Are you sure that you would want a hand-scorcher?
The sandwich form factor does not manage the heat as well as McLux heads or eCan/eSink combos.
The amount of heat being generated by such a combination could result in damage to the LED/BB convertor if left running for too long.
I recently assembled a Downboy/LuxIII sandwich (with extra effort to adequately manage the heat by mounting the LED on a copper slug) for a Stoplight, and that config warms up very quickly.
Even in the DB config, I am considering using a momentary-only switch so that the light cannot be left on to overheat.
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