Hi Paul, it looks like you're making great progress now!

re:
> - Is there an advise, how you snap the perpendicular Curves efficient and keep them snapped?

There isn't really any built in tool for doing that. Depending on the particular situation some kinds of strategies could be helpful like have some extended flat reference lines to target.


> - Is there an easier way to look for the intersection points? I always used ->curve->insect and constructed points.

The Construct > Curve > Isect command is the main way to check for intersection points. The Network command can actually tolerate curves that do not exactly intersect. That can be messy at a major nexus point but out in the middle somewhere it can be ok.

Sometimes it can be good to overbuild something and plan to hack excess areas off with a cutting line rather than trying to do the initial surfacing directly to a target shape...

- Michael