Not only just one fuel feed, but also the Kero start plug is an automotive type at 12volts so should have an almost indefinate life span, also the ECU is already programmed for A123's just change it on screen, unless they have changed something radical in the design as well these will be just as noisy as the G-Booster range unfortunatly, that is the only down side I can see at the moment, but in the UK that is a big down side for club flying.

Mike