If you're going with attys, try the 901s. They run just either side of 3.0 ohms. Under 3.0 ohms they are probably going to trip the protection circuit on those protected CR2s (so it's convenient if you have another PV -- like the SB or Omegato use those 901s measuring under 3.0 ohms. There's no problem with the larger protected CRC123As)
so the cr123's wont fit in the BB? ive been wondering about that?