There are several things you look for in a good sliding stop and contrary to popular belief it has little to do with distance although that is what will get you the plus scores.
The front end (shoulders) need to be picked up. The front legs need to be free moving as does the shoulder. The rear needs to be solid and not skipping. There are different stiles of sliding stops neither seems to score better then the other. It really comes down to the front end and the speed.
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