Here is a new enclosure design for the counter electronics with the SBM-20 tube for 3D printing by Marius

 Here is a nice new design of the enclosure for 3D printing by Marius.  It is made in OpenScad so easily modifiable.

Many thanks Marius,  for sharing!

OpenScad and .stl files can be downloaded from this link  or from Thingiverse

For complete visualisation below are pictures of the make cortesy of Sergiu from Romania.