First of all the curve point is not working very well in spline modeling. It happens to all my other models. With curve handles on the wall is like magnetic nurbs, its not good because is calculated based on path and and reaching points. It make modeling unstable. I strongly suggest that Eovia make sections for all dimension; left to right, top to bottom, front to back sections. And path branches for separated pipeline. So, the curve points can control the modelling better especially for complex modeling. I think they would make it for Carrara 3. Waldoo