Once the carcass has been completed, work proceeds on the roof and interior. Everything is ready to go in the spring of 2022, when the first Sky Line vehicles are supplied and prepared to operate. Each one is supplied in parts, which truck-mounted cranes lift onto the guideway near the maintenance facility. There engineers and mechanics take over and move them into the workshop for assembly and in-depth testing. A lot of work still has to be done before they start operating.