Foolestroupe, you've just reminded me of how I practised and practised on a Landrover (while in the CMF) until I could change from any gear in either ratio into any other gear in either ratio without using the clutch. Listening to both the engine noise and the tyre noise was critical to success, but the, I WAS used to singing harmonies and picking tunes up by ear.

And I still routinely double declutch in some situations even though most cars I have driven in the last 20 years have perfectly good synchromesh.

Cheers, Rowan