This handle replaces the finicky three screws for opening and closing the top vent and comes close to the looks of the door handle.

Openings aren't covered in any way, have a close look at the model.

!!! Print this part with the biggest area on the print bed, so the pocket openings are orientated upwards, you don't need any supports this way !!!

You don't need any additional parts or tools. 

Easy to print without support, I printed mine in Prusament PC Blend Orange.

Dismantle your vent, take the original three selflocking nuts and place them into the three pockets in the handle, watch for the screw hole direction.

You can get rid of the three plastic spacer, their function is already included in the handle model.

Place the handle on the top cover.

Place your slider like original.

Place the original M3x10 screws from the inside (upside down) and attach your handle.

Adjust your air gap with the three screws for smooth sliding.