Daniel,
I'm not aware that this SM1019 had such a feature, though with the flap switch right on top of the power lever, you had what you needed right there.
During my flight testing I did encounter conditions where the pitch forces were near zero through a large range. It required changing one's technique to not "feeling" the plane, but rather "telling" it!
I also did find this aircraft rather poor in directional control at low speed on the runway. Using the flight manual technique for a maximum performance takeoff was an invitation to directional disaster! Landing on wet snowy grass made me very happy that aircraft had reverse thrust available, as a few times that was the control to remain on the runway after landing, not rudder and brakes!