The AMT is a thirsty turbine, but so is an EDF system. Fuel weight reduces with flight time, EDF batteries weigh the same. The tail tube of an EDF set up is a roll of plastic tube, a double wall turbine tailpipe in steel and alu is heavier. Gear needs beefing up to cope with the heavier take off weight on the turbine. The Byron set up was not designed for turbine power, weight speed. Even your EDF will be heavier than the original which would have had 30oz of fuel maximum, but less so than a turbine conversion.

I'd stick with the EDF set up.