Ahhhh yes, forgot about the elevons being high! The engine sits right on the rails using the following mount.

http://dreamworksrc.com/catalog/turb...all-p-298.html

Here is the build thread that i did on mine way back when! Should arm you with some good info. The turbine batterey was in the left wingroot area forward of the fuel tanks, the main battery was a 6C NiCad if I remember correctly was in the nose. My plane had a PST 600R installed.

http://www.rcuniverse.com/forum/m_58.../tm.htm#586665

Hope this helps you out!