In reply to mann9076:
The Dewerstone PDF guide suggests traversing into the Central Groove which while initially seeming a bit easy does mean you get to do the fun finger crack corner at the top. I have done this both times I've done Leviathan. To be honest I'm not really sure why you get to abseil off this particular route but no other routes?
Incidentally in the Rockfax description of Central Groove the finger crack corner at the top is described as the 'technical crux' of the route (4b), so not ridiculously mismatched to Leviathan (4c).
But... given that Rockfax only describes the first pitch, and abbing off the tree directly is not sustainable, you need to either put up some fixed gear/rope OR a sign describing the second pitch. Or both; presumably fixed gear is more likely to be left alone if it has a note on it saying 'fixed gear placed by XYZ in consultation with ABC etc, please do not remove'.
I guess in summary I think traversing into Central groove is pleasant, rather than unpleasant, and thus have never felt the need to abseil!
Post edited at 14:44