I did that same modification to my Speedmaster Pro a couple of years ago and have no regrets.
I think that the adjustable clasp alone was a direct bolt on for my 2015 Seamaster Pro ceramic chronograph, and for my 2016 Titanium Planet Ocean 9300 (using titanium parts). I don’t believe I needed any links.
I also have the titanium six position clasp (117TIZ001151) and the titanium links that I plan to install on my Speedmaster X 33 soon.
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