Going from a speed stance and breaking down into a power stance is not a natural movement. For your return teams to be successful, the speed to power technique needs to be drilled consistently.
In the video below, Pitt special teams coordinator Jacob Bronowski shows you how he drilled the concept when he was at Miami of Ohio.
The video is a segment from his Glazier Drive clinic: Special Teams Concepts for Punt, Kickoff, & Kickoff Return.
Confidence is belief in your technique.
There are two intentions in football:
Create contact: Blocker or Tackler
Avoid contact: Ball Carrier or a Tackler in Space
The junction point is where the stances and intentions meet.
The players' technique is what will win at the junction point.
At the junction point, a blocker is battling to maintain leverage by keeping a high shoulder, and a defender is working to defeat it.