trying to make slightly smoothed corners with Data Transfer, but i accomplish nothing besides making two faces look more flat than they should be. several tutorials show how to do it (this one, for example) and i think i've set everything correctly, including Adding Custom Split Data, but i still can't get the right result.
here is .blend file.
extra info: i have latest stable version of Blender - 2.78c. tried some several years old plugins and they gave no results. also attempted to install blend4web's vertex normals editing tool, but i couldn't even see it in the plugins list. any help will be appreciated.