I heard from DIT and she has a pair of twins she assisted in this build. Check it out. Two more DITs.
Working with as little as 0.3 volts it will truly zap the last joule from a battery.
The finished project operating from a single C cell should function for a very long time.
I am so glad to see more designers in training!
Well done ladies.
Edit: The coils are wound bifilar.