Terraces and swales with a walk-behind tractor using a rotary plow

I have heard in a Curtis Stone video, that a rotatary plow attachment on a walk behind tractor can be used for building terraces.

This fascinates me, as this might open a low-cost opportunity for doing earthworks.

However i cannot think of a efficent way to build said terrace without burrying topsoil under subsoil,
wich should be avoided at all costs.

So can someone hint me smat smart way to build terraces using this implement?

Also sharing of experience for other earthworks that are usually done with excavator/dozer but
have been sucessfully or unsuccessfully attempted with the a rotatary plow would be appreciated.

It seems this question has already been asked once and not answered: https://permies.com/t/64808/terraces-walk-tractor-rotary-plow

Shovel and wheelbarrow to remove the topsoil from the first terrace, move all the subsoil as you want, then use the topsoil from the second terrace to finish the first.  Just like double digging beds.  You will have to move the first terraces soil up the hill to the last terrace.

Any reason why i should start with the bottommost terrace?

While terraces are not a swales they still do catch some water.
Brad lancaster says one should start the rainwater-catchment earthworks at the top of of the catchment area.
I think the logic behind it is that if you start at the lowest point, if has a lot more water to handle
than when you first do the higher catchment.