Couldn't we just override ````Rails.application.config.assets.paths```` from the configuration and add our - udacity specific - directory to it first (http://guides.rubyonrails.org/asset_pipeline.html). Then put in this directory a copy of ````activity.js.handlebars```` (and any other file we want to customize) with the relevant sections removed? This would also remove the need for some of the settings IMHO...