Hi Daveopam,
I don't know how familiar you are with this particular plane. I don't know if you realize that this plane comes in around 18 pounds give or take a half pound. I have been told the flight performance would very marginal at best with the 1.20. The other issue is it takes about an extra pound to a pound in a half with the 1.20 to balance it. The DLE 35 gives the added weight plus more thrust to power the plane.