Just did the mod. Great find OP.
I used this tutorial to remove the vent, much easier than Andy's instructions...
http://burgertuning.com/instructions...ge_install.pdf
Initially I had cutoff the 3 pins and the lights were working but I didn't like how hard I had to push the button, so I did a bit of research with the little tool that I have around the button in search of a 4th pin, and there it was in between the buttons on the other side, I had to push-pull the pin and everything works just like it should, smooth push for on and off...
I can confirm the 1M does not need the Lego part, it has everything needed just cut off the pins on the button.
Again, thanks for the idea, I was ready to buy the euro switch, you just saved me 135 bucks