Ant

I think you will find that the double vertical stab arrangement is too allow the turbine to be placed near the tail and have an access hatch between the vertical stabs. This adds to simplicity of operation and does away with a long thrust tube, it should also provide plenty of room for tanks and radio gear in front of the turbine.

Twin vertical stabs do not seem to have an adverse effect on the F15,F18,Mig29, SU27 etc. maybe your advanced aerodynamic knowledge will allow you to advise us why this is a bad idea?

Best regards

John