These are Case Parts to make a 500 Racks in Stereo or Mono. It's parts of a (DIY) Audio System with 500 modules. The Modules that can used with the 3d files are:
EXT VPR
EXT 51X
STEREO VPR
STEREO 51X
Additional PCBs and needed parts and documentation can be found at linkaudiodesign.de Also check the support Page for Manuals.
Make sure you use the right file for your project either mono or stereo. Stereo 51X come with 25mm Spacers. So the total lenght of the case need to be 177mm.
Stereo VPR, EXT VPR and EXT 51X come with 20mm Spacers so the total length of the case need to be 172mm
The author marked this model as their own original creation.