With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: After evaluating the engineering mock-ups and the full-scale wooden mock-up in February 1956, the RCAF demanded additional changes, selecting the advanced RCA-Victor "Astra" fire-control system firing the equally advanced United States Navy Sparrow II in place of the MX-1179 and Falcon combination. Avro vocally agreed on the grounds that both of these were already in testing at that point, even though both the MX-1179 and Falcon were almost ready for production and would have been nearly as effective for "a very large saving in cost". The Astra proved to be problematic as the system ran into a lengthy period of delays, and when the USN cancelled the Sparrow II in 1956, Canadair was quickly brought in to continue the Sparrow program in Canada, although they expressed grave concerns about the project as well and the move added yet more expense.
text_B: In February 1956, is it likely that blueprints had been finalized for the MX-1179?
YES.