>You'd have to make >the replacement procedure (almost ridiculously) easy I would have thought that having the bait in a box, complete with a new set of electronics etc, so all they have to do is lift up the old box, set the new one down..... do it on the end of a rope from a helicopter..... take the old box away to refill back at base.... 8))) -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads