Substract (Spreads Sets): VECTOR SIZE?

Hi everyone! Stupid problem, but I can find only complicated way to solve it. I’m sure there is a very simple way!

Here, how I can perform a Substract (Spreads Sets) between 3D vector?

SpreadsSets.v4p (6.6 kB)

Cons (Spreads) and Occurrence (Vector3D) and take the ones not unique (in the first Cons input)
see patch for details

SpreadsSetsVector3d.v4p (14.5 kB)

genial! just, need to /3 the index. Thank you!!!