Well done Skytrain10! And I thought Sablatnic would have got it! Yes it is the S.A.I. KZ 11 (KZ XI).
Resembling a Fletcher, this aircraft was designed and built to match a New Zealand Government requirement for a general purpose agricultural aircraft. Variously constructed on wood & ply, and steel tubing and alloy panelling it had a 26 Cu Ft tank, low compression Goodyear tyres and two jettisonable drop tanks each of which held 50 gallons. The single seat sat atop the rear spar. An aerial guide tube ran up the centre of the windscreen acting as an aiming sight for dusting.
S.A.I. began work on it in 1953-54 but it was later destroyed in a hangar fire and the type was then never progressed. The drawing I have shows it registered VH-SAI but I think that was a marketing ploy.
RR
Control is yours!!!!!!!!!!!!!!!!