Congratulations on your mod !
BTW, I would speculate that the inclusion of the 1k resistor is not so much about the voltage difference of the LED (though that certainly could be a factor if the voltage difference is large enough), but rather that LEDs have a VERY LOW impedance (aka internal resistance). ?The problem is without any resistor the LED will overheat and thus significantly shorten its lifespan¡ it might work great for a day, a week, or even a few months but then it will suddenly die¡ I mean it could last a long time, but that would definitely be the less likely outcome. ? However, you are right that 1k is probably a bit of overkill, so you could probably (very easily) get away with a 220 ohm resistor without any issue¡ or you could push the LED a bit harder with a 100 ohm resistor (though lifetime could be affected slightly at 100 ohms)). ?Anything less than 100 ohms is potentially rolling the dice. ?Of course, this is assuming there are no resistors built-in to the front-light itself.?
Cheers,?
Eric
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¡°The longest journey starts with the first step." ?- Lao Tzu
Eric