Update:
Awaiting arrival of some metal sheets (that stick to magnets) tomorrow along with a ton more magnets.
I need to test if the metal sheet is ferrous (magnetic) enough to hold the matches securely.
There is also one issue I discovered as follows:
In my first protos, I use a 3mm x 1mm disc magnet. It's ok and holds the matches well on a metal surface but not ultra strong in the MatchBook (some vigorous shaking and they'll fall out).
I've switched to 3mm x 3mm. These are good, very strong!
In the small test batches I've been making, when I secure the magnets to the bottom of the lights, all with same polarity, the matches don't like being next to each other and need about 3mm between them. If I reverse polarity so one light has a + on bottom, and the one beside it has a -, the next a +, etc... they can sit side by side with no issue.
The other alternative is to use the small 3D printed holder which works well too, but adds about 2mm of thickness.
I'll test out the metal sheets tomorrow and if they work out well, I'm thinking of going with +,-,+,-,+,-,+,- BUT it does mean you need to put them back in the MatchBook in that formation (though they do tend to work themselves out and know which ones want to stick to which ones).
Feedback and suggestions very welcome of course.
I have not yet ordered printed MatchBooks until I verify the metal sheets tomorrow, so I know the exact size.
It's now about 1min per match (going at light speed,
)
Tgwnn