As none of the existing covers exactly suited my needs I designed a new one.
It includes a fan with grid filter and a reset button extender.
The design:
The thing in place
It can be downloaded here http://www.thingiverse.com/thing:170887
Nice!
Very well done!
Maybe I’m a little bit slow-witted, could you please provide some detail info and/or pic how to build the reset extender?
Regards Bernd
I’m away from home for the WE (in Marburg) so I can’t provide a picture or drawing right now. The extender is built with a M3 screw 45 mm long, a nut, the stopper, a 30 mm long spring and another nut in this order. The stopper is fastened with two 3mm screws on the well inside the cover.
I’ll post a picture ASAP.
Jack
Ok I’m back to business.
Here is a picture of the extender.
Hope it will help.
Thank you very much,
now I’ve got it 
Regards Bernd