The third and final SA-29 Spraymaster, a heavily modified DHC-1 Chipmunk for agricultural work. Sasin Aircraft Service designed the modification and Aerostructures at Bankstown carried out the work. Two SA-29s crashed including VH-GEB at Templers, South Australia, on March 29, 1970. Its remains were shipped to the US where it was rebuilt and modified further into a competition aerobatic aircraft as N7DW. The remaining SA-29 was converted back into a standard Chipmunk.