shadowspring
Some planes you can get to KE spin by throwing the sticks a certain way, some planes will do it if you throw the sticks another way.
I like to get a feel for what the plane needs to do then have a plan and practice it. Get the plane on its side stalled, yes you are correct the rudder gets reversed but not too much too soon. Then throw in the down elevator with flaps to get it rotating. Fly the ailerons to keep the wing vertical. Slowly feed in the throttle to increase the rate of spin and rudder to keep it horizontal. You have the idea.
The Magic is tough to really to fly into a KE spin, it's small. Just takes more practice than the larger planes like the UCD.
It takes practice but that's the fun part