Snapping to an Xref Scene

[JamesTaylor]

I've Xrefed a scene into my Viz file and bound it to a dummy object allowing me to move it around etc. What i'd also like to be able to snap to points of the xref... is this possible??

 

Its possible if i use the Xref Object instead but in this method when i update the xref having added new geometry to the file it isn't brought updated with the position relative to the rest of xref... if that make sense??

 

thanks