That's what my impression was on it from Cap Stanaback with his response, like the research and development was still going on because of continued usage by the space program.
It was designed primarily by Mr Randall and Gordon Cooper, put into production, used for intended purpose, became part of history, a relic of an amazing part of our nations history.
It just is odd that it's evolution continues considering it's intended purpose was as an offering to collectors who wanted a replica of the astronaut knife.
In hind sight, I guess it makes those early replicas more special and sought after.
Richard