- a hard edge on those outside vertical corners.
- A track in the inside corner
- hard to describe but the upper corner that goes around your soffit causes an inside corner in the plane of the fabric. Those are hard to do, a little worse with bevel track. Best to have a splice there when you can to avoid it. The anchorage has a little stretch but you have to cut the fabric right up to that corner and they are hard to do, easy to mess up, and prone to a bad...