Quoted from Wolfmarsh:
Nice to see this stuff continuing to progress. I think we've met at SFGE a couple of times.
Regarding some of the conversation about UL listing, it certainly isn't required, but there's an awful lot of insurance (especially commercial) that won't cover any incidents surrounding non-UL listed equipment. That kinda depends on who your target market is though. As you mentioned some people don't care that other manufacturers don't have UL listings on their games. It matters for me personally though.
You are probably ahead of me, but if you haven't, I'd recommend really digging in on the electrical engineering side in order to make sure you have protections and other things in place to prevent issues like coils locking on, fires, shorts, safe grounding on all metal parts, etc...
Have you done any measured tests to compare impact strength, transit time and other variables with your coils versus standard ones? Very curious about those.
Good points ...
Extreme case, but what's the liability without UL listing if your game catches fire and burns down someone's house?
Hope you have a large umbrella policy - Business insurance, one of the many overhead costs that need to be included in the cost of a product.