I know some people accidentaly hit the connector of the perforated plate on the print platform with their spatula. I recently also had this happen and I always try to be careful with that sharp thing.
If the connector gets damaged the table hight isn't detected and crashes into the nozzle.
So I made this little bumper/shield for the Zortrax M200 that hopefully prevents some damage, you can just print it again if the bumper gets damaged.
I used some super glue to glue it to the perf board.