cigarette lighter question

I think you should run 12 gauge wire (or even bigger) for the ignition switch-to-'bus block' connection. If I'm reading you correctly you're considering using a 12-gauge wire for a connection off the block to an accessory, when the wire to the block itself is only 14-gauge... If anything it needs to be BACKWARDS, if the cig lighter pulls enough current to melt a 14-gauge wire it will surely melt the one from the ignition switch before its own; the power supply to the block needs to be able to support the SUM of the potential max current used by all the accessories at the same time.

Maybe I'm reading it wrong but I'm surprised no one else mentioned this...