Neat airplane...This was the first ducted fan jet I built in the late 1980s. It is a Southeast Model Products F-4 Phantom designed around the OS .25 ducted fan I believe. Many folks put the Kress RK 740 in them. I still have plans for mine to put in an electric ducted fan. They have advanced far enough to where a person could put one in that F-4. Did you get directions or plans with yours? I am looking for the CG in particular. Here is a picture...

MACE