The scale is 1:13,5. So it is well suited for the Palmer 132".
On the disc is an entire information about the design, how the landing gear works, how to control the motions of all the doors in correct timing, and how to mount it properly in the model.
However, some skill of working with metals is surely needed to the build.
Parts are turned, milled and laser-cutted. Majority of people (including me) have not such machines available at home. It is supposed to enter the production of main parts in a near metal workshop.
For the digital download, there is a fee of USD 13, the DVD sent per post is for USD 18.
Hope this helps
Cheers Tom