Is there any way to have a contoured flange's " FiniteDepth" snap to an assembly plane?
In my case, the part is the first part of an assembly, so no other parts exist yet to relate the extrusion length too.
without testing... did you try Shift+Select to try to select the plane?
The selection properties for a contoured flange only have options that snap to endpoints, mid points, etc. That's what I am trying to work around. The Shift Select does not allow me to grab an assembly plane.
this is a very easy to approach task if - and I mentioned that very often in the past - if You are using Coordinate Systems rather than Reference Planes.
Create Your references in the assembly with using CS and everything works proper fine and exactly as You are requesting
See 2 pictures before and after changing this CS