I got a set of these when they were first offered. I had most of the parts needed on hand except the transformer and the small regulators. Built it up and have been using it all the time. Saves a bunch of time and effort. I have probably tested and fixed a couple of dozen lamp drivers with it since. Hook it up on the bench and done in about 5 minutes and when I put the board in a game I know it is good. Money well spent for me.