pls3.lte --- Your file, but with K1=0 on all skew quads.
pls3.ele --- Set SYNCH_RAD=1 and ISR=1 on all CSBEND, KQUAD, and KSEXT elements.
         If you run this, you'll see the expected x and y emittances (ey ~= 0)
makeCouplingHarmonicFile
        Use after pls3.ele, since it needs pls3.twi and psl3.param files
        Makes a new file pls3-skewWave.param that powers the skew quads with the coupling harmonic.
        See notes in the script for more detail
pls3-1.ele
        Uses pls3-skewWave.param and shows expected ex=ey=40 pm
