textured lid for flush mounted (electrical junction) box 15x15cm, diagonal screw holes

what is this? 

we had an electrical junction box, closed by a lid 15x15cm, fixed by two 4 mm metric screws. 
this box had glued wallpaper with some structure and been painted white several times over the decades. 

the lid broke and the existing wallpaper were delaminated too. 
 

This is a drop in replacement which needs just a layer of white paint to match the surrounding wall. 

printing

i recommend printing without any retraction (disable in slicer), otherwise the printing time will be even longer and i assume some extruders will run into trouble shredding filament due to too many retractions over the same filament section. 

photos

Pictures of the final result will follow.