ICE: Vortex and Lagoa

[Byron Nash]

I'm trying to make something along the lines of this video from Firebird
https://vimeo.com/29367269. It uses Lagoa and some of the vortex techniques
Brad showed in one of his videos. I can get it to move somewhat but can't
keep the points on the curve. They tend to fling off despite increasing the
"suction" controls. How does Lagoa respond differently to forces than
normal ICE particles?