I am wondering how can I better associate flange length in a drwaing. currently up to vertex and up to edge/merge does not work say with the geometry I am using and say if I want to use the blind feature why can I not use and equation or say D1 as the value. Is there a way I should be thinking about this. Like only solid geomtry can define this value or 3d vs 2d sketches? any help here. Currently I have to manually update this peramiter if my other associated files change.