Thanks for the replies.
but what wind? I dont think you need wind details to work out Track Error and Closing Angle with a whiz wheel:
1) Set distance flown on inner-scale against distance off on the outer. Read off heading error against the index mark to avoid further error.
2) Repeat Procedure with distance remaining with distance off track. Add both headings to give total correction to arrive at destinaton.
All this is pretty simple, streight forward and takes very little time. Especially when you do it at the half way point where the distance remaining is the same as distance flown. In this circumstance all you would do is double the heading you found in step 1. Simple right?
Now i have been practising a lot on the ground. Havent tried it in air yet. I wonder what would be so distracting about that?