Assembling a Retro Chip Tester Pro

I&rsquo;ve been considering adding a chip tester to my lab for some time now, but I&rsquo;ve never quite taken the plunge. BackBit, whom I know well because I have a BackBit Pro cartridge that I use to load software onto my 8-bit computers, has the Chip Tester Pro V2 . I was close to buying one, but I found it somewhat expensive, and importing it from the US didn&rsquo;t help, so I waited.