User blog comment:Dranon Andermas/The Restrictions Of Travel/@comment-68.97.4.36-20120127021514

I think best way to implement is an item that is built in sets of 2 (get ingredients build and it produces 2 linked together items, clolored  same to show pairing) something along lines of warp orbs, which would look like tiki torchechs, but with colored spheres at top intsead of flames. Once both are set in place the orbs light up (colored same as its matching counterpart) and a simple right click on one sends you to the other.