untill you understand ACM and they become second nature, stuff like a "tail slide" is moot....get in there and fight, get yourself to be able to use the plane on the edge, and then youll understand exactly how your plane reacts to your inputs, and then the tailslide will be a no brainer, learning the ins and outs of your plane of choice is far more important, and then learning the all the other planes, youll see a tail slide is nothing, and actually can hurt you. Its NOT a ACM.