Quoted from NPO:
So I'll vouch and say I have actually SEEN this be the case. Note this post from 2 years ago:
My castle lock optos were reading out of order. If I recall correctly, they were triggering 2-1-3 instead of 1-2-3. I knew there was no way the wires just magically "swapped places" on the optos. I ordered the new board as I had heard great things about them, and sure enough, my optos triggered in the correct sequence at that point.
Seeing is believing, and that was all I needed to be sold.
Unfortunately, now the new board is faulty; however....
Think if I hadn't just installed this board and my mist ball circuit started acting up. I'd be installing a faulty unit into my game, and then I'd really be chasing my tail. No thanks.
So, at the end of the day, yes, I do buy boards to keep my games sound. I'd rather have it and not need it then need it and not have it.
So, I wanted to post a resolution to this situation.
To recap: Dec 2016, I purchased both opto boards for BSD. I'm a big believer in preventative maintenance, and when a 25 year old PCB burns out on me, I don't want to wait a month to get it from Australia. I want it now.
So I got both, and unfortunately, both of them were faulty boards.
Mike from Homepin got two new boards on their way to me with quick shipping from Australia. He wanted no money for them; he sent them right away. I have since received and installed them (probably about 1.5 weeks ago now), and I am pleased to say my game is 100% fully functional. Everything works, and I have thoroughly enjoyed my BSD playing probably no joke 50-100 games on it since installing the replacement boards Mike sent to me.
Buy Homepin's products with confidence. He did right with me, and I will always support and toot the horn of a good businessman like Mike.