In reply to
The easier line on the Carrick Castle boulder is a 7b+ of Dave Redpath's. It has a cool jump move to the jug on the lip of the roof. He didn't do the line to the right. As I recall he was talking in terms of 8a or 8a+, but I don't know how much he tried it. This is a good few years ago, mind. The rock on that line isn't of the best quality.
You haven't seen anything else of interest on your wanderings with the kids, have you? The Anvil is pretty much climbed out now, so we need to find new crags!