That really sounds feasable although I am not sure what you mean when you say "Crab in steady state flight does not require any control surface to be deflected" surely in my example I would have some left aileron to counteract the rudder which is holding track and if I have this right doing a sideslip would be the opposite. That is, right aileron (lower wing lowered into the wind) and rudder to hold track.
I have tried both these on the simulator but because of depth perception problems it isn't as easy as in flying a real model. Not sure how the latest 3d sim by "real flight" would fare there. it may be alot better.
This landing lark is gettingto be quite a busy affair, what with juggling with aileron, rudder and power. Still, all good fun.
I did witness one of our club flyers last year do a very spectacular side slip in to a perfect cross wind landing. Because of the distance away and starting on a turn it looked very impressive.
Practise I guess. practise.
I must also say a huge thank you to the support one receives here. It is very, very useful and very kind of people to take their time to help.