Drawing Compare Tool in Rhino for merging changes between Make2d drawings

Scripting
,
2
  1. Make sure outputs of Make2D command are on separate (parent) layers.
  2. SelDupAll command can be used to select all elements that were not added/modified (it selects them on both drawings). Effectively Invert command then becomes a difference between them - new and modified elements.
  3. This advice from Mitch how to use SelDupAll to select duplicates from only one group (tldr: lock it)
  4. This script by Pascal may be used to tag (set user text) to all objects in a file although Make 2D conveniently enough puts all objects into a separate “layer stack” already.