I would add in an important aspect is that even if in disagreement, we're communicating. That means that opinions can (eventually) crystalize around a single understanding and potentially a call to action. People should be wary of calling each other glowies and qtards because that person could be standing at your shoulder when shit goes down.
I like this idea. Should be maskless everyday, of course but doing it this way where the maskies just stay the fuck home would help hasten a return to normality when all the people only masking due to social pressure could actually see how few actually want to comply.
Antifa are for hiding in large crowds and instigating violence and then running away. BLM are largely people who have been fed a false narrative and have nothing better to do during a pandemic.
The people you probably need to watch out for are groups like the John Brown gun club.
They may genuinely believe they're providing a better life for their children and descendants even without the chain immigration. It may even actually be worth the risk.
That's why we have to have things done right on our end.
You can also do it with a 3D printer (though the strength isn't there, at the moment, there's room for improvement) and I bet you could have a pretty good go with hand tools.