how to make perfect intersection?

[NURBSKIILSME]

Hello all 🙂 I'm trying to make an intersection to trim the surface.

now I extend surfaces to match it perfectly but it keeps going wrong like in the pictures.

anyone tell me the solution, please?

 

 

[systembolaget]

The surface... which surface? Match it... match what? Maybe attach a .wire file and describe what should happen but doesn't.

[NURBSKIILSME]

I tried to trim it after intersecting it. and I found I can snap a cv on a curve using ctrl+alt! thanks 🙂