Ordered Russian SI-22G / SI22G Geiger Tube. Expected delivery around the beginning of March...

Also pulled Solidworks model files, since most users prob won't have access to that. Will likely transition this project onto OnShape, here's the diffuser as a start:

https://cad.onshape.com/documents/cc162031441e680698595b2a/w/eaa2b5ab492bdde8eaa25799/e/3cf96559478af369a68cae4b

If someone could please check to make sure this opens OK, that would be great :)