I really need to work on is advancing down the wicket to spin bowling.
hello - two questions, firstly what sort of standard are you playing and secondly why do you need to go advancing down the pitch?
I ask the first question as at most levels you get enough bad balls that giving the bowler the charge isn't necessary and the second is a little more self explanatory - but I think it is very difficult (not impossible) to teach someone to come down the track to a spinner because it is a very natural act and the best at it do it instinctively.
If you don't have the instints to do it (and I don't - not many people do) you are likely to premeditate the charge and as a result you are likely to miss the ball.
Certainly a half decent spinner will love to see the batsman giving him the charge...