Hi Pat !

All i know is that a Guy called Peter Michel from Germany has build one a few years ago; it was huge and Powerd by i think 2 Turbines. Know there is also a Full Composite Kit available from him, or from a good friend of him Harald Breuer.

Here is the Link to his Homepage, but only in German Language !?
www.michel-concorde.de

If i can be of any help for you let me know ok !

Regards

Thomas