So far an APUG forum search has yielded nothing useful. My MX has developed an insatiable appetite for cells to run the meter. Even after service by a well-regarded Atlanta area company new cells last only a few days, rather than the 12 to 18 months they did in the past. I've removed the bottom plate and the tiny switch which turns on the meter via the shutter release seems to work, according to my digital VOM. Does anyone have any suggestions before I ship this beauty off to Eric for service? Many thanks!