The start button is often too sensitive, so I constructed this protection around. Not only a ring - because with such a small ring it would be very difficult to bring out the plastic glue on the ring bottom surface - very dangerous if you take to much to bring the glue into the key - to glue the key, would be the horror...
This is the reason for this kind of shaping - we get enough area for the glue.
Perhaps you will have a look on my Youtube-channel: diy but also 3dPrinting - come and see.

https://youtube/c/basteley

Bye bye - the basteley - from Germany