I’m spawning splinemesh components along a closed loop spline mesh. The Splinesmeshes look good however when the source spline flips over for the return the splinemeshes keep the same orientation.
What (I think) you need to do is to rotate your vertices in the correct orientation using local coordinate system to see where their Z is pointing at. Once done it should be quite easy to move them around.
I need to change environments to test it out but I’ll send you an example later today.