Re: Wouldn't Trinity make it after the first three...?
Sadly <a href="https://en.m.wikipedia.org/wiki/Third_Shot”>not true</a>. The only argument at the time was whether to use them as production allowed, or to save them up for use in Operation Downfall.
There were yield problems at the Hanford site due to the Wigner effect and excess <sup>240</sup>Pu, but they were mostly in 1946 and eventually solved or worked around.