Just realizing-- it's pretty amazing they have been able to do work to something in the middle of the park with few (or maybe no) disruptions to the area around it. Thinking back to Transformers and Velocicoaster construction, there were times when construction vehicles were going through the park while it was open to bring materials and equipment in and out with guests being held on the pathways, but I haven't seen anything like that with this. And I assume they had to remove the old ride system and bring the new one in, but I guess most or all was done when the park was closed.