I've finally assembled this dream razor. It took some time (~11 months)
I wanted to present this razor to my FIL who was a prominent oceanographer and circumnavigated the globe a few times.
But back in Dec. 2020 the parts were unavailable and then in March 2021 COVID took my FIL.
I, therefore, abandoned this idea for a few months.
But then Brian (at CharcoalGoods) suddenly resumed operation and then Jack (from YPM) agreed to produce a small number of brass caps.
So the ball started rolling and orders were placed.
Coincidentally, I've just returned from my first ever sailing trip...