FYI, the Disneylands in Anaheim and Hong Kong have the exact same Space Mountain track layout. Hong Kong Disneyland was being built the same time Disneyland came to realize they needed an extensive refurbishment for theirs, so they ordered two new copies to be built. Hong Kong Disneyland installed theirs and built the new building and dome around it, while Disneyland had to cut a hole in the back of their existing Space Mountain building, dismantled and pulled out the entire old coaster, and installed the complete new coaster, all through a hole that couldn't have been more than about 20 feet wide.