if the male a'dam was on this side of the aryth ocean and the seanchan a'dam on the other, how is there a similarity in design and purpose? just a coincidence?

who was the male a'dam originally used on for it to have absorbed all that sadness and pain? just an unknown male channeller after the breaking?

Cuendillar only becomes stronger if you channel at it, yet the seals weaken as the DO touches the world again. arguably he's touching the seals with the true power, would it be possible to destroy cuendillar with the TP, destroy the male a'dam?

Could Callandor be destroyed in this way?

Would it be possible to make Cuendillar using the TP?