The one problem I see that the URL is gonna get either looonnnggg or really delicate as we found out. Another idea or approach to consider would be * Use JSON and localstorage in the browser * Everytime value changes - generate a HASH of the JSON in localstorage as the unique ID part of the URL * When loaded from a URL with a HASH decode the hash back to JSON and update localStorage or something similar to that effect * As looks like you have alot of code working and manipulating that URL which seems delicate I think I have some time next week to hack and collab on this project as I think its ACE