Have particle orientation align to spline

[rolfinscher]

Hi guys,


first: tyFlow is really amazing! Many thanks to Tyson!!!


Here is my problem though:
I also try to align particles along a spline. 

Unfortunately I still have issues with the orientation.
If I use "Sibling Align" the particles simply flip at 180 degrees.

If I use "Surface Align" some of the particles start at some point to turn.

Running out of ideas...

thx
rolf