Here i offer you a Berlin disc STL File
 
these files contain:-
berlin disc
 
Slicer settings:-
This is a display prop 15% infill is sufficant 
please use MeshMixer to cut this model to fit you printer
 
Please read the following
As this is a digital file I do not issue any refunds for this product however if you do stumble across and issue or you need further assistance with your model please feel free to contact the website and we will be happy to help 
all future updates to this model and every digital model are free for a lifetime 
 
Terms and conditions 
under no circumstances are you allowed to resell this product of share it with anyone who has not purchased this product. anyone who is caught violating this rule will be BANNED from this webpage and will no longer receive any updated files