Skill development: Ability to change your putt speed
Forget about systems that indicate the length of a motion to control distance.
This is an internal focus on the body, better focus on external factors like controlling the distance with feel.
It’s all about your feeling to putt to a certain distance.
This can be best trained with differential drills for different distances.
All following length will be in feet. If you need yards or meters, check this table. Don’t be to accurate for the long putt drills, it doesn’t matter if you are +/- 2 feet for a starting point.
When you train, I would recommend to use your laser to approximately measure a distance.
Practice on your skill to change putt speed.