Not really tried, but I believe a 0.1mm copper sheet shim (or two) under the emitter would probably sort of fix the fully focused “batsignal” :-D issue.
Heat transfer in that SK98 is decent, it is possible to run the light on high without issues. I believe I did measured at most ≈90°C on high with an infrared gun aiming at the emitter on top of the lens, as it came stock (≈6.5 - 7W at the led) with the stock emitter, mounted over an aluminium non-DTP board.
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