Well At least Im using my 1Kth post for something useful,
It's an SMD interface'd drive tester/exerciser I've one in the large black case upstairs.
You can use it to set up seek patterns to test the servos, do writes & reads to test heads & i/o and quite a lot more. I haven't got an instruction manual though, so I can't be of much help & I've not had to use it yet, so I've not tried to learn how to use it properly, and it's 25 years since I used a similar one.