If the Bowderstone was by the sea. Will does the 3 existing 8As first go, then puts up 2*8A, 2*8A+, 8B, 8B+, all in one session.
And in a comment reply, he says
I dropped the last move of spots 3 times now, just waiting for it to dry at the moment.
so looking promising, especially with the forecast for the next few days.