As part of the 2017/04 Retrochallenge, went thru the code and optimized it further. It has gone from 703 bytes in the initial release to 714 bytes for gear and lever stepping and the same functionality now occupies 679 bytes. By changing the jumps to a conditional jump that is always taken, 7 extra bytes can be eliminated for a new smaller size of 672. 

http://arduinoenigma.blogspot.com/2017/05/retrochallenge-2017-rc201704.html