The little tip on the end of the blade of the Research nipple driver is there to limit the amount of run up on the spoke.
The idea, is to start with an equal amount of spoke engagement, before the tension/truing, and dishing process begins.
Then itās a give and take process between all the spokes while centering radially and laterally.
You should end up with a fairly equal amount of engagement, once the wheel has been tensioned and trued.
A rear wheel has a fair amount of dish, so the right side will show more nipple engagement than the left side.
But if you start with all the spokes with the same amount of engagement, and take from one side while giving from the other side, youāll end up with a minimal difference between the two sides.