As some have observed, you are in the back seat. Before you address anything else, you must correct this condition. And for someone who has obvious ability on skis, this can be a tough nut to crack.
So let's address the fundamentals of fore&aft balance on skis and in the process, make our term definitions clear.
- Back seat. This term basically means that you are directing your mass (weight under gravity) primarily through your heels. ie, this is how you are managing balance (fore&aft) in order to keep standing, which for many, is survival priority #1. If you look at your fore&aft alignment it is pretty obvious.
Since the time when you developed the ability to stand up, this is how you statically balanced (fore&aft) when not involved in the process of locomotion (walking running skipping etc). Now, you put on a pair of skis which are basically a platform to statically stand on and you apply the only static balance configuration your brain and autonomic nervous system knows. Add to this, as you try and redirect you skis across the hill, this heel focus only intensifies and leads to an extended bracing action of the outside leg.
Ironically, the solution is only a couple of inches but many hours of implementation/practice away. You need to develop and train your brain (and drive into your autonomic nervous system) to consistently balance, not through your heel, but through the arch.
Let's think of it in the context of a sensor. Right now, the sensor for static balance is in your heel. You don't overtly think about it or recognize it because that sensor has been driven into your autonomic nervous system over your lifetime.
You now need to move that sensor forward to the center of the arch and place sub sensors at the back of the ball of the big toe and the heel.
To get an idea of how that feels, just spread your feet a little wider than the shoulders and stand on the insides of your feet and begin to bounce flexing your ankles, knees and hips. You need to feel the tension building in the arch supported by the ball of the big toe and inside of the heel.
You also need to recognize that the flex complex (ankles, knees, hips) is the new governing mechanism for controlling this method of balance The ankles being most important and the hips being most critical. Also, the torso remains steady and quiet in support of the flex complex directing pressure through the arch. In contrast, the heel based static balance relies on our skeletal structure because we are assumed to be at rest.
And that is one of the fundamental conundrums in skiing. Many skiers are applying static balance principles to a platform that moves.
I wish you well.