I believe, that the wheel is actually two separate primary sections.

The first is the area where the extra power is added by the falling mass

The second is the area where the extra power is put into the wheel to keep it moving

Each works with the other, but by thinking about it as a separate area we can begin to unravel the mystery once and for all.

The storage and transfer of the additional energy is the key     How he did that is the missing link.