Well, after 174 minutes of coagulation I cut the coagulum, the curds were fine. Proceeding with the recipe I came to the cheddarring, and after 75 minutes of testing acidification by heating and trying to stretch a piece of curd, I gave up, the curd didn't stretch. It was well after midnight, because of the very long coagulation period, so I put the cheese in the press. Now it is drying, it looks good, it feels good. Although it might not be a genuine Cheddar, I am sure it will be eaten. Today or tomorrow I'll wax it.