Hi,
I'm building a tool to make it easier for an editor  to go through the edits/revisions in an article. The tool shows the changes in html rather than in wikitext. The content that was removed/deleted in a revision disappears & the new content/ modifications is made to appear.    
The demo is bare bones & I'm working on adding the following features . 
Hoping to hear some ideas or suggestions on the slider to select the start and end revision , especially when the article has thousands of edits over five or six years. 

Thanks
Jeph