Possible WWII Aggressor Squadron Information

[Dynoman]

Looking for information on the squadron that operated P-39 Airacobra's as an aggressor type of unit during World War II. Here are some pictures of the squadron's aircraft. From what I was able to find, one of the aircraft was involved in a landing accident at Santa Rosa Air Field, CA while flying with the 392nd Fighter Squadron. However, I do not know if the 392nd FS was operating this aircraft while it was being used as an aggressor or if it was associated with a different squadron entirely (i.e. transferred to another unit). The "Z" on the nose usually designates a fuselage code for the based-air field, however, "Z" was used for the Thomasville Army Air Field in Georgia. Any ideas where these aggressors were based or what squadron they were with?

An interesting note: The 392nd FS was based for a short time at Tonopah Army Air Field flying the P-39 for air-to-air gunnery training, which if this was the unit flying these aggressor P-39s, then it was foretelling of the future that Tonopah would play in foreign tactics and dissimilar training.

 

[Dynoman]

Found that the Las Vegas Army Airfield also used the "Z" fuselage code for its flexible gunnery school. This may have been part of Operation Pinball, the secret program to have flexible gunners use frangible bullets made of bakelite to target RP-63 King Cobras in their training program. The Airacobra may have been a part of this program or maybe a separate program for targeting fighters. Indian Springs (now Creech AFB), near Las Vegas, was also used for gunnery training.
The P-39 below has a different paint scheme than the ones above, which may have been used in Operation Pinball. Any details on the use of the Airacobra?
https://www.thearmorylife.com/project-pinball-worst-idea-of-world-war-ii/

 

[RAP]

There is also a book on this, avaliable on Amazon.

Operation Pinball/the USAAF's Secret Aerial Gunnery Program of WWII​