Simple CNC Z probe

I didn't want to order this Z probe from aliexpress and wait 2 months, and buying it from amazon is pure madness as they sell this thing for 10€. So I decided to build one almost identical to those they are selling, apart from the price: I built this thing for 0,01€cent. Literally! :) Here is what you need to build one:1 eurocent coin; if your country has a different currency, I recommend to choose a small coin because otherwise it becomes very hard to solder it as there's more heat dissipation.2 cables. I used those for RGB LED strips, I stripped two of the four wires.super gluesoldering ironsandpaper, 100 grit is ok I suppose, that's the one I usedconnectors, but it really depends from you as you are free to choose whichever connector type you like. I used a 5mm barrel plug because obviously it matches the female connector I added on my CNC front panel. On the other side (green terminal, in my pictures) I think I will add an alligator clip but I'm not sure, I still ha