Limit/home switches - how are you mounting 'em?

So I want to add some home switches to my new little CNC, but I'm a little stumped how these things are physically (& robustly) affixed to the machine.

For example...

http://www.ebay.co.uk/itm/CNC-LASER-...item230d0c5fb1

are the two small holes...mounting holes, or are theyjust holding the switch together?!!!

I pulled some similar switches from some old dot matrix printers, but I'm stumped for a way of mounting them...gluing seems very cack....these things shouldn't ever be able to either move or fall off, but whenever I see a pic of a limit/home swithc it never jumps out at me "aha...so that's how you mount them!"

Personally, I immediately thought of a chassis mount barrel type switch...ie drill a small hole in my gantry upright, pop the switch in...it ain't going nowhere then....but alas ....not seeing any....must be missing the point (I normally do!)

They are mounting holes, usually around the 2 - 3mm mark.

The roller switch is usually activated by a ramp fixed to the moving component. Vast overshoot is okay. It's more a limit sensor than a position sensor.

A button microswitch is much better than a lever if you want position. Simply add a bolt to physically stop the slide before it crushes the switch. Theoretically you stop before you hit the bolt :naughty:

As robin says, small screws through the holes work well.
There are various types of levers available on microswitches, it's just a case of picking a style that suits your needs.