together with the opening of the works in 1997, and the opening ceremony saw the unveiled locomotive, now consisting of the frame with its three cylinders and cab attached. Early 1998 saw the smokebox construction started and the tyres fitted and by 1999, forging of the motion components had started with the first delivery of components commencing in January 2000. By September 1999, the last wheel had been pressed onto the wheelset, which was delivered to Darlington by July 2000. By January 2000, the front bogie had been assembled. With the fitting of these parts, the mounting of the frame onto the wheelset, and fitting of the smokebox, by the end of 2000, the most visible missing parts of Tornado were the boiler and tender. Post-2000, assembly and setting of the motion proceeded, and attention turned to the design of the boiler; a £250,000 appeal was launched. Tornado became a rolling chassis by October 2002, and achieved the first synchronous movement of the motion and all wheels in August 2004. 2005 saw construction of the boiler in Germany, with construction begun on 16 October, and completed in time for delivery on 16 July 2006. By June 2007 Tornado's internal construction was sufficiently complete to allow fitting of the boiler to the frame, using a 100-ton crane. The most complex casting, the superheater header, was started in 2007, and after defeating two foundries the complex shape was cast by a third supplier. Owing to space constraints at Darlington works, the Tornado tender frames and body were built off-site, with the body being significantly built locally in Darlington. The tender wheelsets were assembled by an East Lancs Railway-based company. The tender frame and wheelset were united by December 2007, and the tank attached to it by February 2008. From its construction until final testing was completed, Tornado sported a grey coloured undercoat as a precaution in case the boiler cladding had to be removed. The livery was described as "works grey" in a "satin finish". While in this undercoat, Tornado wore the web address of the A1 Trust on the side of the tender and the mark RA9 on the locomotive cab, denoting its route availability. Commissioning Boiler tests [[File:Boiler safety valve of 60163 Tornado.jpg|thumb|left|One of Tornado'''s boiler safety valves]] A computer simulation was used to assist in the setting up of the valves and motion. The boiler safety valves were tested