Joist family with nested family

[Anonymous]

Hi all,

I'm creating a family that uses as basis the joist system family from Revit.

My aim is that when I model the joist the embed plate would appear automatically in the correct place and in the correct size. 

I managed to do that and it works perfectly in a flat plane. As soon as I started playing in the project environment with the Start/End level offset the embed plate would still remain perpendicular to the joist and not to the wall. I managed to fix that too, by locking my embed plate to a reference line whose angle changes depending on the Start/End level offset difference in value.

My issue is that even though now the embed plate is parallel to the wall (in project) there's a very slight misalignment from the edge of the wall which I cannot figure out how to fix.

The size of that is minuscule (anywhere between 1/64" -5/256"), but it can be either inwards or outwards of the plane of the wall, which means that in elevation the plate might show up as it's inside of the wall face.

Any suggestions?