SBM-21 tube and test source assembly

This is an assembly enclosure for SBM-21 tube and some test source (for random number generator project). As a geiger counter and instead of Arduino I use this kit:
http://www.ebay.com/itm/152348539563?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

If you found my design useful or inspiring and would like to buy me a cup of espresso you are welcome to tip me:

https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=U25V96GZNVL3N&source=url

Thank you!