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Cheers,
thanks very much! I ended up figuring it out just by messing, and ended up in the same place as your scene.

Say i had some points from a scatter or some particles i had cached out on a certain frame as a bgeo, how do i then import those points back into a DOP network.
To clarify I dont want to emit new particles from these points, I mean ok these points are now the particles already birthed.
Cheers

I can't give you a detailed answer, but perhaps you could try limiting the velocities of the particles in the y direction?
Another option may be to create a piece of torus shaped geo that emits when the particles reach a certain height?
Without further detail on what you are trying to achieve its hard to come up with suggestions.