Oh it took a few beats but I believe the questions are about two different hands 🙂
The hand holding the two tails may not need to slide and that does depend on how much slack is built for the drop. Since the hand is overhead for the forced arabasque shape, the distance between hand and back foot is part of the slack variability. This length is effected by flexibility. One thing to try if you think the slack is longer for this reason, when grabbing the pole from the forced arabasque, look at grabbing as close to your hip as possible. Keep us updated!