Span Direction Symbols picking up parametric direction

Hi All,

We have successfully created a node that adds a span arrow at the (average) centre of each floor within the view with a direction specified by the floor direction.

However, there is a big problem with this! For some reason, the span arrow does not make the floor a host. This is a problem if one of the slabs changed span direction as the span arrow doesn’t update.

Is there any way of hosting the span arrow to the floor through dynamo?

Thanks a bunch,

James Gregory