(although it is all within the known theories..)
Imagine..bucket A full of air. Bucket B 1/10 air.
On the surface of the water, bucket A need 2 kilos of weight to stay just under.
Bucket B so needs 200 grams for the same.
A flows to the bottom and has a well deserved rest.
B flows down, misses the concrete pillar and sits beside A with 200 grams on top.
Fine..now a swirl lifts B and places it on top of a stone.. as long as the stone doesn't reach the 1/10 air in bucket B, nothing new happens.
Fine..another swirl (i like them) and B floats over the concrete pillar in its shape.
Still nothing new happens..the concrete will just reach the air but not touch it i guess.
Only thing is when we want the bucket B to go the last centimeters towards the bottom, we now need to apply more weight to it.
Eventually as much as on bucket A.
The concrete pushes against the air, if the air could not go sideways, it has to compress and maybe even more weight then on A is needed for the last centimeters.
The concrete replaces and acts like air, forcewaylike in which water could not. Because it is still in contact with the rest of the water and can escape out the bucket.
But how in the heck use these properties to gain energy out off?
Hmmm..