re: #138 William Lewis

Let’s just say that anyone with a working knowledge of shaped charge demolitions could put together a working implosion. The real secret all those years was that it was not as difficult as they made it out to be. It’s not anywhere near as fussy as the various stages needed to trigger a fusion device.

This is true. But I seem to recall that the wavefront propagation is very precise to achieve full yield, or if you use anything else than the original Fat Man / Trinity shaped charge.