Looked at this line for quite a while and wondered whether it would go, listed as a project in the new Dumby/Dumbuck guide.
Abseiled down it today to have a look and give it a clean and I decided to give it a go, it went easier than I thought, 2nd go.
It's probably the last problem to go at Dumby that isn't a link up or an eliminate of existing problems so I'm quite happy to have got it done.
It's very similar to the problem to the left, Hoops, but has a slightly harder top out so I think that 7c is fair.
Get on it while it's clean!