Mount opto-stop

I had some troubles to adjust the mechanical zero-osition switch for the Z-ax. As this is very important for getting a sufficient sticking onto the bed, I decided to use the opto-stop from REPRAPWORLD.com, which is quite cheap (€ 7,10) and very reliable.
Now it is working perfect.
The opto-strip should be of black material as it has to interrupt the light-signal.
The mounting plate(montageplaat) can be easily mounted on top of the Z-motor.