Like any spin, moving your head is key. So, use the lifting the tip of your forward ski technique outlined above, and pop into a spin, looking back to see the jump onto the rail. Stomp it with steeze, which keeping your eyes up will help, and then go get the chicks that just fell in love with you.
Also, learning a good fs 270 out is a direct step towards doing quick fs switchups at the end of the rail. You just throw the switchup a little early, bounce your skis off the rail at 180, and then turn 90 degrees to get pointed downhill.