In reply to Roger@tilda:
As we speak, Gary is choosing a suitable chunk of Kalymnian limestone, which will be shipped across to the UK.
Whereupon it will be suitably crafted by artesans, then to be winched and suitably engineered into place. Then where one can look in awe and wonderment, and try the movement over such stone and then reflect was it really 6a.
Cheers