Not sure I follow your reasoning on several points.
The TSBD was a perfect location, right by the hairpin turn onto Elm.
TSBD6 was not a floor with offices, but only boxes of books. Nobody went there except to place or retrieve books. By luck, the JFK motorcade passed the TSBD during the lunch hour. Again, that was luck, but made for an excellent sniper's secluded nest. The TSBD6 was deserted. Perhaps, if someone had been there, LHO would have gone up to TSBD7.
I don't know every building in Dallas, but the TSBD was about good as one could hope.
LHO was able to secret a rifle into the TSBD without notice. That alone made the TSBD a good choice. LHO, a lithe 24, and who had mustered through Marine boot camp, knew of the back stairs out of the TSBD, that would provide a quick exit. He proved the worth of that exit route.
My suspected second gunsel indeed may have fired from another location behind the limo, such as Dal-Tex building. I don't know.
Of course, the JFKA was risky operation. The use of a diversion on the GK likely increased odds of escape.
Still, again, you are assuming the perps think as you do.
For example, the perps of the 1954 Capitol shooting cared more about the act, than escaping.
The shooting of the U.S. Capitol occurred on March 1, 1954, when four Puerto Rican nationalists—Lolita Lebrón, Rafael Cancel Miranda, Andres Figueroa Cordero, and Irvin Flores Rodríguez—fired approximately 30 shots from the House visitors' gallery to protest U.S. rule, wounding five congressmen. All assailants were captured, convicted, and imprisoned, later having their sentences commuted by President Jimmy Carter in 1978 and 1979.
In 1950, two Puerto Rican nationalists, Oscar Collazo and Griselio Torresola, attempted to force their way into the Blair House in Washington, D.C., where Truman was staying during renovations of the White House.
In both above cases, there was a conspiracy of assassins, who wanted to perp the act more than they wanted to escape. There was Latin American leftist politics being played out. There were zealots and extremists all over Cuba and Latin America during the 1950s-60s. Assassinations were common.
(AI: Political assassinations in Latin America during the 1950s and 1960s were frequent, reflecting intense Cold War tensions, the prevalence of military dictatorships, and rising revolutionary movements. These killings often aimed to eliminate political opposition, silence critics of entrenched regimes, or, in the case of CIA-backed initiatives, prevent the spread of communism.)
A couple hot-head G2'ers, seeking revenge for JFK's many assassination attempts on Castro, may have also wanted to perp the act more than they wanted to escape.
The G2'ers may have been surprised they were able to simply drive away from Dallas, and then to read in the papers that LHO was a LN.
You say there were flaws in the JFKA CT. Of course, there were---it was a simple, low-level op. But it worked, so it wasn't that flawed.
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I have not done much plinking, and that long ago. I did fire a 30.06 and I saw why everyone seemed to like them. I don't know why you are so down on Winchesters. Maybe you had a lesser sample.
AI: Model 70 (Bolt-Action): Often called "The Rifleman's Rifle," the Model 70 is praised for its accuracy, classic Mauser-style controlled-feed action, and three-position safety. It is considered a top-tier hunting rifle.Model 94 (Lever-Action): Iconic for deer hunting, the Model 94 is known for being lightweight, compact, and reliable in rugged conditions.
The Winchester is also highly regarded.