Long time ago I replaced the stock QX1J star in my old SL Lux Jr. with a RX0H and played a little bit with the pot on the driver board. I hadn´t measured the current with the stock luxeon before, but with the RX0H it was something like 380-390 mA (IIRC). I don´t know it exactly but I have vague in mind that the currents were not affected so much by the star swap. They went up a bit, but not too much ... the driver isn´t a very efficient one.
The heatsinking isn´t well made, because only the outer parts of the star are making contact with the body. And another drawback ... the luxeon star is cutted/grinded down to a smaller diameter. A regular star doesn´t fit, until you modify it too. If you do this, check the star for short circuits afterwards, apart from that it´s not a difficult mod.
A swap with a S**H-Bin shouldn´t be a problem. Maybe it decreases lifetime a little bit due to the increased current, but who cares ... the S**H won´t "instaflash", that´s sure and the most important part
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