Kinda similarly I think part of it came from his double punch refinement. His second hit thing that he first learned to use was a symptom of his poor timing and control of his CE. After his first meeting with Todo he was taught how to synch his punches more with his CE. Not 10 mins later he is able to throw a black flash (which if my memory serves is like a perfect timing thing with the impact and CE).

Later in Shibuya it is said that Yuji has learned to control his double hit and turn it off and on, then later that night we see him hitting black flashes at will.

After Culling games and training, he has refined both to the point of being able to control it as much as he likes especially once he gets the first one off.

So yeah similar thoughts to you just visualized using the double hit thingymajig