I think using smaller diameter washers work even better, since it wont allow any unwanted rotations or angles, someting that is allowed using the larger washers/ shims as shown in the video. (The corner of the razorblade tends toward the LED in the video since it is not supported by the washer)
Then a clean and straight cut will be easier to achieve by using the whole washer as a support.
It’s true but the first priority is finding the right thickness. It’s a bonus if you can find a nicely sized hole but ultimately without fabricating something it might be hard. I still mess one up every now and then since I insist on making a very close cut.
I suddenly had a thought while watching the video.
What if instead of using washers you used feeler gauges. Buy a set and drill a 6-10mm (1/4-3/8 freedom unit) hole through them. Stack them to very precise heights.
That’s what I use. If you buy the right set you can do 3535 LEDs using the hinge hole without even drilling anything. Best to deburr the hole so the razor doesn’t catch the edge though.
How to do : Dedomed xhp70.2 inside a flashlight?? bcos it seem glued permenently… I can only open the head benzel and glass lens. Now that sound like a challenge…anyone?