Hi Marc,
My MXZ's darted like crazy. The Simmons totally cured it. There is no pushing in corners, even in a chewed up trail or with three inches of fresh powder on top of the trail. the sled goes perfectly straight and turns on a dime. Steering effort is easy. My Pantera came with the blow molded skis, they pushed and wandered like crazy. The Simmons made it handle like a slot car. I have mentioned this to Rob a few times, I am that sure the Simmons would cure his problems. A couple things about the Simmons, or any dual runner ski. They do not like ice or snow that it hard as a rock, such as a plowed logging road travelled by logging trucks. Then they shake and dart like crazy. But 99 % of the time, they are the best aftermarket product I've ever purchased. They are far better than the SkiDoo dual runner ski.
mike