My last sled was an SX also. Due to 144 studs, it also tended to push into the corners. Pulling the straps in made it feel very heavy in the front and hard to steer, so instead I compensated by using either 8" or 10" carbides on C7A Pros. Talk about a slot car. I do still miss whipping that sled through the corners.
My wife's 99 Phazer had the straps way too loose so she couldn't make the corners well. At each stop, we pulled the straps in slightly more and it got progressively better. Then we ended up going a little too tight, and it instantly felt like a sled that weighed twice as much.
For maximum traction and safety, I don't believe that you should pull the straps in to a point where the rear of the track touches ground before the front. Just my opinion.
Back to the subject though, the Vectors do have more ski lift then the SX. Probably because they actually have suspension. There are a lot of different views on this forum about how folks like to set them up to get them to corner better. I am also running 10" carbides on this sled to be able to keep the front preload a little light. There are also a lot of different claims concerning hyfax life. I don't treat the hyfax that well, but mine seem to be wearing at an acceptable rate.