Maybe someone could help me with a loft?
I Try to create a canopy for my little drone. But I get stuck at creating the loft.
The problem is that the loft works like in this file but I get overhangs instead of a vertical base.
Then I tried to add a new sketch to solve the overhangs but when I try it with the sketch which is visible then the loft is not working. So can anyone help me to solve this?

Or do I have a complete wrong approach for creating this canopy?
Glad If someone could point me then to the correct direction.

Best regards Simon