Hello.
In flat pattern, default bending line should be UP, since bending machines press from top-down direction.
It is also easier to mark UP lines with laser when in production.
It is logical, that we cannot solve the parts with UP and DOWN lines, but below example, it could be solved.
Probably flat pattern on part should be changed on the opposite plane, since most of the parts it shows DOWN.

Best regards,
Rene Repina