Kingdom 12 - swap for some DB04rs?

I've got a used 2011 version Kingdom 12 firing unit and remote that I'd like ideally to swap for some DB04rs OR the Chinese 4-channel 'happiness' modules. I've got a few of both - it's a shame they don't use the same frequency but I'd be happy with a few of either type to swap with this Kingdom 12 kit.

Or if you haven't got any 4-channel mods... make me an offer!

Cheers,
Chris.

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