Well I am a PSIA type and the only time my skis are 50/50 is during turn transition. Also, 1.75% difference in a 15m turn radius is about 2 1/2 feet or .82M. That is a lot of tip lead.
Leaving two clean equal width tracks in the snow seems to be the holy grail of many ski instructors and I think that comes as a result of certification testing where they want to see if you can ski that way. Just because they want to see it in certification testing, does not mean they believe you should ski this way. They test a lot of one footed skiing and don't expect you to ski that way either.
I can demonstrate a rail road track turn where the ski tracks are nice and even but, if I am hauling and having fun, my outside track will be nice but my inside track can vary and be far less than perfect even though I am rock solid on the skis.
I can quite easily tighten my turns to the point where it's nearly impossible to leave a clean track on the inside ski. I have skis that that have a 17M turn radius and anything below the point where my hips reach about 16 inches above the snow, I cannot leave a clean line. The turn radius gets too small, the G forces get too high or there is interference from the various fat parts of my body. Any way you cut it I have not been successful. Have I tried? yes.
I asked a mentor of mine earlier this year to take a look at my skiing and determine why my inside ski was diverging in carved turns. His answer was "You are on a bunny hill, you have your skis on very high edge, your hips are 10-12 inches above the snow, you are turning perhaps a 10 M radius turn with GS type skis, your inside ski is not diverging but hogging out a wide path and you want me to tell you what is wrong with your skiing? What's wrong is in your head, back off the throttle and the problem will go away. Is it necessary for you to always get the last drop out of a bunny hill? A lighter touch is better and your skiing will look better". My answer was " Buuuut I like the feel of that turn". His answer was "You can only get so much out of a bunny hill. You might like that turn but it's screwing up your skiing by introducting upper body contortions that will carry over into all the rest of your skiing and into the steeps. You asked for my opinion now stop it. "
I did stop, went back to a lighter touch and my body is happier but now I have been told that I have that awful PSIA examiner look to my skiing instead of the PMTS look.
If I want pazzaz I guess I will just have to get off the bunny hill.
The point here is that I was skiing a turn radius well below the skis natural radius, I was finishing my turns well across the fall line to get power out of a bunny hill. The result was no way could I adjust the pressures fore/aft or laterally to get that inside ski to carve a clean edge. Sometimes we get caught up in thinking along the lines that PSIA promotes the skiing we do in certification testing but that is really all bullpucky. 50/50 or clean carves do not necessarily mean good technique or bad technique.
Sometimes yeah just gotta shut up and ski.