Case for AVR component tester

This is a case for a variant of the quite wonderful universal transistor and component tester developed by Markus Frejek, and later Karl-Heinz Kübbeler. A full description of the project is available here:

http://mikrocontroller.net/articles/AVR_Transistortester

This case fits a kit sold by Banggood, see http://www.banggood.com/DIY-Meter-Tester-Kit-For-Capacitance-ESR-Inductance-Resistor-NPN-PNP-p-929603.html

There is one version of the case bottom with holes for M3 countersunk sc