Not sure how you would quantify this, but enough? Inventing detonators that worked fast enough (i.e. small enough error in firing time) was one of the challenges. They did a lot of tests of those explosive lenses. (32, not 9, of course.)
The electronics to fire them would have comparatively easy to test well, and I'm sure they over-designed it all. I doubt that duplicating it would have made anything better.
The electronics to fire them would have comparatively easy to test well, and I'm sure they over-designed it all. I doubt that duplicating it would have made anything better.