The alarm on my monitor is pretty loud but, as Gary says, it won't be particularly audible in the arena. It'll be handy more when you've just come out of a battle to see what voltage you're sitting at.

I still have reservations about how long my battery pack will last. I'm limited by dimensions so will be hitting up teh intarwebz tonight to see if an increase in battery capacity greatly increases the physical pack size. If I can find something similar to what I've currently got, I'll probably upgrade before the champs just to make sure I won't be running low or cutting out in the middle of a battle. Hopefully testing will give me a better idea of how long the battery will last too.

No flipper chassis yet Tony, so little chance of getting it running before Barnsley. Not that I was planning on going anyway :P
Got those tank connectors unscrewed yet?