All ripened now. 1 took about 2 days, the other 3 took about 5.
I've been polishing up the art of the clean split, removal of the pit and a clean single scoop with a dessert spoon
Warm ciabatta with bacon, avocado ... yum, and today with chicken, avocado and bit of mayo ... very tasty!
Thanks for all the tips
Strangely, the ones I bought were technically past their sell by date but in fact just unripe. I think it was about a pound for the four.