Would it be possible to make this filter by one of the signals instead of having to set manually? Essentially what https://mods.factorio.com/mod/Filter_Combinator does, but your mod is better as it uses circuitry, and that one is unmaintained and crashes

What exactly do you mean?
That is what are you requesting to be able to do, and what should happen when you do said thing?

Ah sorry, I meant "one of the wires". So you connect red and green wires, and then can choose to:
- Only allow green signals that also appear in the list of red signals.
- Remove all green signals that also appear in the list of red signals

Not currently, I would have to think of a way to do it, and it would be a separate combinator if anything.

I've forked the above mod and at least fixed it so it stops crashing. If I get time I might use the hidden combinator trick with it. Thanks for the quick responses :)

It should work in 1.0.0 now

Amazing, thank you :). I've added a link from my fork of the original filter combinator mod directing people to your mod first. If I get time I'll write a migration too so I can deprecate mine