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Did you ever figure it out? I realize it is a little late now. Did you put the diode in the correct orientation? If you flipped it the diode would just act as a stop.
That would definitely be a good way to safeguard against any damage. I haven't had any issues with that yet, but better safe than sorry is not a bad way to go. Thanks for idea, I think I might need to try and update the post.
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