Another newbie problem - since you were so good with the skateboard - here's another thing.
Image draft attached, don't laugh, it's like 5 years old had drawn it. But the problem is, this is a corner element, the first image on left is the side view. Two of these components are place to 90° angle at each other (top view in the middle), but the corners are not touching. The top part is curved. Then there is the front face, which is my problem, it's linear in side view but horisontally curved at top (the yellow part). How do I get this surface done?
I hope you understand what I'm trying to do.

