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@John: Sorry but I just realized that I missed your post. It’s been a while so I’m hoping you worked this out. You can try running with voltage as high as 6.5 to see if that helps and some people use 5 diodes instead of 4 for the test load. I’ve used 4 on all my drivers and they’ve all worked per the guide so it’s possible you have a bad driver. The quality of the latest versions doesn’t seem to be as good as the original versions. Let me know if you got everything working and also how you did it so others might benefit.