This conversion set is meant to be combined with the Special Hobby 1/48 scale X-15A-2 kit convert the X-15A-2 (the second X-15 built) to the configuration of the third aircraft that was built. With this aircraft the official world altitude record was set in 1962. The resin parts include a replacement canopy (the clear sheet is to be cut to provide the windows) and tail section parts to convert the 'stretched' A-2 version back to the original configuration. The resin parts are finely cast with some flash but no visible air holes. The instruction sheet details which Special Hobby steps to follow and where to make the modifications to convert the model into the second X-15. Both text and graphical steps are included, along with a four view painting and decaling guide. A short program history of the vehicle completes the instruction sheet.