Here's another to ponder: How about a warning dinger that lets you know if your chassis battery voltage is getting low? I know Country Coach has one that works through the voice processor (nag, nag, nag). It would be a simple exercise to add a circuit with a "dinger" to alert you when the battery volts cross a certain threshold. Maybe do double duty with the "key on, engine not running" dinger. Perhaps two different dingers? Let me know if this sounds like a good idea, and I'll gin up something to bring to Branson. Might be fun.