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Nice! This is great!
You could do this with a handheld electric router, instead of a CNC router. Electric routers can be purchased at Home Depot, Lowes, etc.
You set the depth of cut for CNC router, or adjust the router depth for a handheld electric router. I did this in step 4, I used a 0.8" depth of cut for the 1" thick slab of wood to leave 0.2" remaining.
I left 0.2" thickness, or approx 5mm of wood remaining. 0.3mm is very thin and I would be very concerned about accidentally damaging the surface of the desk. Consider using an alternate charger, with a greater charging distance like the one I showed in my guide. Hot glue isn't as nice as a threaded solution like the Evoline, but it still works!
I'm not sure. My guess is that any chargers following the Qi wireless charging standard would have similar distance/range. Select a wireless charger that matches or exceeds the wattage supported for wireless charging your phone. For example, if the iPhone 8 supports 7.5W charging over wireless charging, be sure to purchase a 7.5W or greater wireless charger.
You could try something like this for a DIY router:https://lifehacker.com/use-a-chisel-to-make-a-handheld-woodworking-router-1732957767
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