Does Beat Boxing while your skiIng help?  I cant slide the c box very good at stevens, and yesterdya i was all  ' BMp bu Bump bump bump bu bump, chicka chaca chika errep erp erp erep' down the in run and went 630 on to 50 50. i slid out on the landing but i still grabbed lue kang off the box.  i couldnt believe it. try it out to see if it helps you.