Hi,
Yeah, this is a known problem with the Anchor point of the Window node, we are currently working on it.
Regarding the Walls, the Position parameter is actually for "Position" in Classification and Properties. It is not for the position of the Reference Line, rather a structural parameter. Having more control over the Reference Line though has been a long-time request, and we are working hard on it.
Regards,
Daniel Alexander Kovacs
Professional Services Consultant
GRAPHISOFT
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