When the horizon is below grips or a slot then a jumper is too low. For some reason, some jumpers dock, take death grips and then pull their arms in so that their white, knuckled clenched fists are right at their shoulders. Most jumpers don't even realize they do this until you point it out to them. This may be a manifestation of fear or anxiety. A broken grip in an already completed star can wreak havoc to jumpers.
Some jumpers do wrong by chasing the open grip or reaching for it.
Jumpers should drive forward and fly their slot with respect to the set up jumpers or clone. The grips will come together when everyone in the formation does this. Sometimes a jumper drives too far forward and blocks off the slot for a neighboring jumper, as shown in Fig. 1. The advantage of this is that a closed formation exists at all times, provided no grips are lost. The disadvantage is that jumpers tend to forget about flying the formation once they dock.